1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2015, 2018-2023 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7 #include <net/mac80211.h>
8
9 #include "mvm.h"
10 #include "sta.h"
11 #include "rs.h"
12
13 /*
14 * New version of ADD_STA_sta command added new fields at the end of the
15 * structure, so sending the size of the relevant API's structure is enough to
16 * support both API versions.
17 */
iwl_mvm_add_sta_cmd_size(struct iwl_mvm * mvm)18 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
19 {
20 if (iwl_mvm_has_new_rx_api(mvm) ||
21 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
22 return sizeof(struct iwl_mvm_add_sta_cmd);
23 else
24 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
25 }
26
iwl_mvm_find_free_sta_id(struct iwl_mvm * mvm,enum nl80211_iftype iftype)27 int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, enum nl80211_iftype iftype)
28 {
29 int sta_id;
30 u32 reserved_ids = 0;
31
32 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32);
33 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
34
35 lockdep_assert_held(&mvm->mutex);
36
37 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
38 if (iftype != NL80211_IFTYPE_STATION)
39 reserved_ids = BIT(0);
40
41 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
42 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) {
43 if (BIT(sta_id) & reserved_ids)
44 continue;
45
46 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
47 lockdep_is_held(&mvm->mutex)))
48 return sta_id;
49 }
50 return IWL_MVM_INVALID_STA;
51 }
52
53 /* Calculate the ampdu density and max size */
iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta * link_sta,struct ieee80211_bss_conf * link_conf,u32 * _agg_size)54 u32 iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta *link_sta,
55 struct ieee80211_bss_conf *link_conf,
56 u32 *_agg_size)
57 {
58 u32 agg_size = 0, mpdu_dens = 0;
59
60 if (WARN_ON(!link_sta))
61 return 0;
62
63 /* Note that we always use only legacy & highest supported PPDUs, so
64 * of Draft P802.11be D.30 Table 10-12a--Fields used for calculating
65 * the maximum A-MPDU size of various PPDU types in different bands,
66 * we only need to worry about the highest supported PPDU type here.
67 */
68
69 if (link_sta->ht_cap.ht_supported) {
70 agg_size = link_sta->ht_cap.ampdu_factor;
71 mpdu_dens = link_sta->ht_cap.ampdu_density;
72 }
73
74 if (link_conf->chandef.chan->band == NL80211_BAND_6GHZ) {
75 /* overwrite HT values on 6 GHz */
76 mpdu_dens = le16_get_bits(link_sta->he_6ghz_capa.capa,
77 IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START);
78 agg_size = le16_get_bits(link_sta->he_6ghz_capa.capa,
79 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
80 } else if (link_sta->vht_cap.vht_supported) {
81 /* if VHT supported overwrite HT value */
82 agg_size = u32_get_bits(link_sta->vht_cap.cap,
83 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
84 }
85
86 /* D6.0 10.12.2 A-MPDU length limit rules
87 * A STA indicates the maximum length of the A-MPDU preEOF padding
88 * that it can receive in an HE PPDU in the Maximum A-MPDU Length
89 * Exponent field in its HT Capabilities, VHT Capabilities,
90 * and HE 6 GHz Band Capabilities elements (if present) and the
91 * Maximum AMPDU Length Exponent Extension field in its HE
92 * Capabilities element
93 */
94 if (link_sta->he_cap.has_he)
95 agg_size +=
96 u8_get_bits(link_sta->he_cap.he_cap_elem.mac_cap_info[3],
97 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
98
99 if (link_sta->eht_cap.has_eht)
100 agg_size += u8_get_bits(link_sta->eht_cap.eht_cap_elem.mac_cap_info[1],
101 IEEE80211_EHT_MAC_CAP1_MAX_AMPDU_LEN_MASK);
102
103 /* Limit to max A-MPDU supported by FW */
104 agg_size = min_t(u32, agg_size,
105 STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT);
106
107 *_agg_size = agg_size;
108 return mpdu_dens;
109 }
110
iwl_mvm_get_sta_uapsd_acs(struct ieee80211_sta * sta)111 u8 iwl_mvm_get_sta_uapsd_acs(struct ieee80211_sta *sta)
112 {
113 u8 uapsd_acs = 0;
114
115 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
116 uapsd_acs |= BIT(AC_BK);
117 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
118 uapsd_acs |= BIT(AC_BE);
119 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
120 uapsd_acs |= BIT(AC_VI);
121 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
122 uapsd_acs |= BIT(AC_VO);
123
124 return uapsd_acs | uapsd_acs << 4;
125 }
126
127 /* send station add/update command to firmware */
iwl_mvm_sta_send_to_fw(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool update,unsigned int flags)128 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
129 bool update, unsigned int flags)
130 {
131 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
132 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
133 .sta_id = mvm_sta->deflink.sta_id,
134 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
135 .add_modify = update ? 1 : 0,
136 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
137 STA_FLG_MIMO_EN_MSK |
138 STA_FLG_RTS_MIMO_PROT),
139 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
140 };
141 int ret;
142 u32 status;
143 u32 agg_size = 0, mpdu_dens = 0;
144
145 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
146 add_sta_cmd.station_type = mvm_sta->sta_type;
147
148 if (!update || (flags & STA_MODIFY_QUEUES)) {
149 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
150
151 if (!iwl_mvm_has_new_tx_api(mvm)) {
152 add_sta_cmd.tfd_queue_msk =
153 cpu_to_le32(mvm_sta->tfd_queue_msk);
154
155 if (flags & STA_MODIFY_QUEUES)
156 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
157 } else {
158 WARN_ON(flags & STA_MODIFY_QUEUES);
159 }
160 }
161
162 switch (sta->deflink.bandwidth) {
163 case IEEE80211_STA_RX_BW_320:
164 case IEEE80211_STA_RX_BW_160:
165 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
166 fallthrough;
167 case IEEE80211_STA_RX_BW_80:
168 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
169 fallthrough;
170 case IEEE80211_STA_RX_BW_40:
171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
172 fallthrough;
173 case IEEE80211_STA_RX_BW_20:
174 if (sta->deflink.ht_cap.ht_supported)
175 add_sta_cmd.station_flags |=
176 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
177 break;
178 }
179
180 switch (sta->deflink.rx_nss) {
181 case 1:
182 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
183 break;
184 case 2:
185 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
186 break;
187 case 3 ... 8:
188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
189 break;
190 }
191
192 switch (sta->deflink.smps_mode) {
193 case IEEE80211_SMPS_AUTOMATIC:
194 case IEEE80211_SMPS_NUM_MODES:
195 WARN_ON(1);
196 break;
197 case IEEE80211_SMPS_STATIC:
198 /* override NSS */
199 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
200 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
201 break;
202 case IEEE80211_SMPS_DYNAMIC:
203 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
204 break;
205 case IEEE80211_SMPS_OFF:
206 /* nothing */
207 break;
208 }
209
210 if (sta->deflink.ht_cap.ht_supported ||
211 mvm_sta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ)
212 add_sta_cmd.station_flags_msk |=
213 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
214 STA_FLG_AGG_MPDU_DENS_MSK);
215
216 mpdu_dens = iwl_mvm_get_sta_ampdu_dens(&sta->deflink,
217 &mvm_sta->vif->bss_conf,
218 &agg_size);
219 add_sta_cmd.station_flags |=
220 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
221 add_sta_cmd.station_flags |=
222 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
223
224 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
225 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
226
227 if (sta->wme) {
228 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
229 add_sta_cmd.uapsd_acs = iwl_mvm_get_sta_uapsd_acs(sta);
230 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
231 }
232
233 status = ADD_STA_SUCCESS;
234 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
235 iwl_mvm_add_sta_cmd_size(mvm),
236 &add_sta_cmd, &status);
237 if (ret)
238 return ret;
239
240 switch (status & IWL_ADD_STA_STATUS_MASK) {
241 case ADD_STA_SUCCESS:
242 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
243 break;
244 default:
245 ret = -EIO;
246 IWL_ERR(mvm, "ADD_STA failed\n");
247 break;
248 }
249
250 return ret;
251 }
252
iwl_mvm_rx_agg_session_expired(struct timer_list * t)253 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
254 {
255 struct iwl_mvm_baid_data *data =
256 from_timer(data, t, session_timer);
257 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
258 struct iwl_mvm_baid_data *ba_data;
259 struct ieee80211_sta *sta;
260 struct iwl_mvm_sta *mvm_sta;
261 unsigned long timeout;
262 unsigned int sta_id;
263
264 rcu_read_lock();
265
266 ba_data = rcu_dereference(*rcu_ptr);
267
268 if (WARN_ON(!ba_data))
269 goto unlock;
270
271 if (!ba_data->timeout)
272 goto unlock;
273
274 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
275 if (time_is_after_jiffies(timeout)) {
276 mod_timer(&ba_data->session_timer, timeout);
277 goto unlock;
278 }
279
280 /* Timer expired */
281 sta_id = ffs(ba_data->sta_mask) - 1; /* don't care which one */
282 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[sta_id]);
283
284 /*
285 * sta should be valid unless the following happens:
286 * The firmware asserts which triggers a reconfig flow, but
287 * the reconfig fails before we set the pointer to sta into
288 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
289 * A-MDPU and hence the timer continues to run. Then, the
290 * timer expires and sta is NULL.
291 */
292 if (IS_ERR_OR_NULL(sta))
293 goto unlock;
294
295 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
296 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
297 sta->addr, ba_data->tid);
298 unlock:
299 rcu_read_unlock();
300 }
301
302 /* Disable aggregations for a bitmap of TIDs for a given station */
iwl_mvm_invalidate_sta_queue(struct iwl_mvm * mvm,int queue,unsigned long disable_agg_tids,bool remove_queue)303 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
304 unsigned long disable_agg_tids,
305 bool remove_queue)
306 {
307 struct iwl_mvm_add_sta_cmd cmd = {};
308 struct ieee80211_sta *sta;
309 struct iwl_mvm_sta *mvmsta;
310 u32 status;
311 u8 sta_id;
312
313 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
314 return -EINVAL;
315
316 sta_id = mvm->queue_info[queue].ra_sta_id;
317
318 rcu_read_lock();
319
320 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
321
322 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
323 rcu_read_unlock();
324 return -EINVAL;
325 }
326
327 mvmsta = iwl_mvm_sta_from_mac80211(sta);
328
329 mvmsta->tid_disable_agg |= disable_agg_tids;
330
331 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
332 cmd.sta_id = mvmsta->deflink.sta_id;
333 cmd.add_modify = STA_MODE_MODIFY;
334 cmd.modify_mask = STA_MODIFY_QUEUES;
335 if (disable_agg_tids)
336 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
337 if (remove_queue)
338 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
339 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
340 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
341
342 rcu_read_unlock();
343
344 /* Notify FW of queue removal from the STA queues */
345 status = ADD_STA_SUCCESS;
346 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
347 iwl_mvm_add_sta_cmd_size(mvm),
348 &cmd, &status);
349 }
350
iwl_mvm_disable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int sta_id,u16 * queueptr,u8 tid)351 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
352 int sta_id, u16 *queueptr, u8 tid)
353 {
354 int queue = *queueptr;
355 struct iwl_scd_txq_cfg_cmd cmd = {
356 .scd_queue = queue,
357 .action = SCD_CFG_DISABLE_QUEUE,
358 };
359 int ret;
360
361 lockdep_assert_held(&mvm->mutex);
362
363 if (iwl_mvm_has_new_tx_api(mvm)) {
364 if (mvm->sta_remove_requires_queue_remove) {
365 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP,
366 SCD_QUEUE_CONFIG_CMD);
367 struct iwl_scd_queue_cfg_cmd remove_cmd = {
368 .operation = cpu_to_le32(IWL_SCD_QUEUE_REMOVE),
369 .u.remove.sta_mask = cpu_to_le32(BIT(sta_id)),
370 };
371
372 if (tid == IWL_MAX_TID_COUNT)
373 tid = IWL_MGMT_TID;
374
375 remove_cmd.u.remove.tid = cpu_to_le32(tid);
376
377 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0,
378 sizeof(remove_cmd),
379 &remove_cmd);
380 } else {
381 ret = 0;
382 }
383
384 iwl_trans_txq_free(mvm->trans, queue);
385 *queueptr = IWL_MVM_INVALID_QUEUE;
386
387 return ret;
388 }
389
390 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
391 return 0;
392
393 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
394
395 cmd.action = mvm->queue_info[queue].tid_bitmap ?
396 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
397 if (cmd.action == SCD_CFG_DISABLE_QUEUE)
398 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
399
400 IWL_DEBUG_TX_QUEUES(mvm,
401 "Disabling TXQ #%d tids=0x%x\n",
402 queue,
403 mvm->queue_info[queue].tid_bitmap);
404
405 /* If the queue is still enabled - nothing left to do in this func */
406 if (cmd.action == SCD_CFG_ENABLE_QUEUE)
407 return 0;
408
409 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
410 cmd.tid = mvm->queue_info[queue].txq_tid;
411
412 /* Make sure queue info is correct even though we overwrite it */
413 WARN(mvm->queue_info[queue].tid_bitmap,
414 "TXQ #%d info out-of-sync - tids=0x%x\n",
415 queue, mvm->queue_info[queue].tid_bitmap);
416
417 /* If we are here - the queue is freed and we can zero out these vals */
418 mvm->queue_info[queue].tid_bitmap = 0;
419
420 if (sta) {
421 struct iwl_mvm_txq *mvmtxq =
422 iwl_mvm_txq_from_tid(sta, tid);
423
424 spin_lock_bh(&mvm->add_stream_lock);
425 list_del_init(&mvmtxq->list);
426 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
427 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
428 spin_unlock_bh(&mvm->add_stream_lock);
429 }
430
431 /* Regardless if this is a reserved TXQ for a STA - mark it as false */
432 mvm->queue_info[queue].reserved = false;
433
434 iwl_trans_txq_disable(mvm->trans, queue, false);
435 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0,
436 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
437
438 if (ret)
439 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
440 queue, ret);
441 return ret;
442 }
443
iwl_mvm_get_queue_agg_tids(struct iwl_mvm * mvm,int queue)444 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
445 {
446 struct ieee80211_sta *sta;
447 struct iwl_mvm_sta *mvmsta;
448 unsigned long tid_bitmap;
449 unsigned long agg_tids = 0;
450 u8 sta_id;
451 int tid;
452
453 lockdep_assert_held(&mvm->mutex);
454
455 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
456 return -EINVAL;
457
458 sta_id = mvm->queue_info[queue].ra_sta_id;
459 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
460
461 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
462 lockdep_is_held(&mvm->mutex));
463
464 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
465 return -EINVAL;
466
467 mvmsta = iwl_mvm_sta_from_mac80211(sta);
468
469 spin_lock_bh(&mvmsta->lock);
470 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
471 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
472 agg_tids |= BIT(tid);
473 }
474 spin_unlock_bh(&mvmsta->lock);
475
476 return agg_tids;
477 }
478
479 /*
480 * Remove a queue from a station's resources.
481 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
482 * doesn't disable the queue
483 */
iwl_mvm_remove_sta_queue_marking(struct iwl_mvm * mvm,int queue)484 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
485 {
486 struct ieee80211_sta *sta;
487 struct iwl_mvm_sta *mvmsta;
488 unsigned long tid_bitmap;
489 unsigned long disable_agg_tids = 0;
490 u8 sta_id;
491 int tid;
492
493 lockdep_assert_held(&mvm->mutex);
494
495 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
496 return -EINVAL;
497
498 sta_id = mvm->queue_info[queue].ra_sta_id;
499 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
500
501 rcu_read_lock();
502
503 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
504
505 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
506 rcu_read_unlock();
507 return 0;
508 }
509
510 mvmsta = iwl_mvm_sta_from_mac80211(sta);
511
512 spin_lock_bh(&mvmsta->lock);
513 /* Unmap MAC queues and TIDs from this queue */
514 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
515 struct iwl_mvm_txq *mvmtxq =
516 iwl_mvm_txq_from_tid(sta, tid);
517
518 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
519 disable_agg_tids |= BIT(tid);
520 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
521
522 spin_lock_bh(&mvm->add_stream_lock);
523 list_del_init(&mvmtxq->list);
524 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
525 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
526 spin_unlock_bh(&mvm->add_stream_lock);
527 }
528
529 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
530 spin_unlock_bh(&mvmsta->lock);
531
532 rcu_read_unlock();
533
534 /*
535 * The TX path may have been using this TXQ_ID from the tid_data,
536 * so make sure it's no longer running so that we can safely reuse
537 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
538 * above, but nothing guarantees we've stopped using them. Thus,
539 * without this, we could get to iwl_mvm_disable_txq() and remove
540 * the queue while still sending frames to it.
541 */
542 synchronize_net();
543
544 return disable_agg_tids;
545 }
546
iwl_mvm_free_inactive_queue(struct iwl_mvm * mvm,int queue,struct ieee80211_sta * old_sta,u8 new_sta_id)547 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
548 struct ieee80211_sta *old_sta,
549 u8 new_sta_id)
550 {
551 struct iwl_mvm_sta *mvmsta;
552 u8 sta_id, tid;
553 unsigned long disable_agg_tids = 0;
554 bool same_sta;
555 u16 queue_tmp = queue;
556 int ret;
557
558 lockdep_assert_held(&mvm->mutex);
559
560 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
561 return -EINVAL;
562
563 sta_id = mvm->queue_info[queue].ra_sta_id;
564 tid = mvm->queue_info[queue].txq_tid;
565
566 same_sta = sta_id == new_sta_id;
567
568 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
569 if (WARN_ON(!mvmsta))
570 return -EINVAL;
571
572 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
573 /* Disable the queue */
574 if (disable_agg_tids)
575 iwl_mvm_invalidate_sta_queue(mvm, queue,
576 disable_agg_tids, false);
577
578 ret = iwl_mvm_disable_txq(mvm, old_sta, sta_id, &queue_tmp, tid);
579 if (ret) {
580 IWL_ERR(mvm,
581 "Failed to free inactive queue %d (ret=%d)\n",
582 queue, ret);
583
584 return ret;
585 }
586
587 /* If TXQ is allocated to another STA, update removal in FW */
588 if (!same_sta)
589 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
590
591 return 0;
592 }
593
iwl_mvm_get_shared_queue(struct iwl_mvm * mvm,unsigned long tfd_queue_mask,u8 ac)594 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
595 unsigned long tfd_queue_mask, u8 ac)
596 {
597 int queue = 0;
598 u8 ac_to_queue[IEEE80211_NUM_ACS];
599 int i;
600
601 /*
602 * This protects us against grabbing a queue that's being reconfigured
603 * by the inactivity checker.
604 */
605 lockdep_assert_held(&mvm->mutex);
606
607 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
608 return -EINVAL;
609
610 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
611
612 /* See what ACs the existing queues for this STA have */
613 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
614 /* Only DATA queues can be shared */
615 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
616 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
617 continue;
618
619 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
620 }
621
622 /*
623 * The queue to share is chosen only from DATA queues as follows (in
624 * descending priority):
625 * 1. An AC_BE queue
626 * 2. Same AC queue
627 * 3. Highest AC queue that is lower than new AC
628 * 4. Any existing AC (there always is at least 1 DATA queue)
629 */
630
631 /* Priority 1: An AC_BE queue */
632 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
633 queue = ac_to_queue[IEEE80211_AC_BE];
634 /* Priority 2: Same AC queue */
635 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
636 queue = ac_to_queue[ac];
637 /* Priority 3a: If new AC is VO and VI exists - use VI */
638 else if (ac == IEEE80211_AC_VO &&
639 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
640 queue = ac_to_queue[IEEE80211_AC_VI];
641 /* Priority 3b: No BE so only AC less than the new one is BK */
642 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
643 queue = ac_to_queue[IEEE80211_AC_BK];
644 /* Priority 4a: No BE nor BK - use VI if exists */
645 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
646 queue = ac_to_queue[IEEE80211_AC_VI];
647 /* Priority 4b: No BE, BK nor VI - use VO if exists */
648 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
649 queue = ac_to_queue[IEEE80211_AC_VO];
650
651 /* Make sure queue found (or not) is legal */
652 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
653 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
654 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
655 IWL_ERR(mvm, "No DATA queues available to share\n");
656 return -ENOSPC;
657 }
658
659 return queue;
660 }
661
662 /* Re-configure the SCD for a queue that has already been configured */
iwl_mvm_reconfig_scd(struct iwl_mvm * mvm,int queue,int fifo,int sta_id,int tid,int frame_limit,u16 ssn)663 static int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo,
664 int sta_id, int tid, int frame_limit, u16 ssn)
665 {
666 struct iwl_scd_txq_cfg_cmd cmd = {
667 .scd_queue = queue,
668 .action = SCD_CFG_ENABLE_QUEUE,
669 .window = frame_limit,
670 .sta_id = sta_id,
671 .ssn = cpu_to_le16(ssn),
672 .tx_fifo = fifo,
673 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
674 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
675 .tid = tid,
676 };
677 int ret;
678
679 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
680 return -EINVAL;
681
682 if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
683 "Trying to reconfig unallocated queue %d\n", queue))
684 return -ENXIO;
685
686 IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
687
688 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
689 WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
690 queue, fifo, ret);
691
692 return ret;
693 }
694
695 /*
696 * If a given queue has a higher AC than the TID stream that is being compared
697 * to, the queue needs to be redirected to the lower AC. This function does that
698 * in such a case, otherwise - if no redirection required - it does nothing,
699 * unless the %force param is true.
700 */
iwl_mvm_redirect_queue(struct iwl_mvm * mvm,int queue,int tid,int ac,int ssn,unsigned int wdg_timeout,bool force,struct iwl_mvm_txq * txq)701 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
702 int ac, int ssn, unsigned int wdg_timeout,
703 bool force, struct iwl_mvm_txq *txq)
704 {
705 struct iwl_scd_txq_cfg_cmd cmd = {
706 .scd_queue = queue,
707 .action = SCD_CFG_DISABLE_QUEUE,
708 };
709 bool shared_queue;
710 int ret;
711
712 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
713 return -EINVAL;
714
715 /*
716 * If the AC is lower than current one - FIFO needs to be redirected to
717 * the lowest one of the streams in the queue. Check if this is needed
718 * here.
719 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
720 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
721 * we need to check if the numerical value of X is LARGER than of Y.
722 */
723 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
724 IWL_DEBUG_TX_QUEUES(mvm,
725 "No redirection needed on TXQ #%d\n",
726 queue);
727 return 0;
728 }
729
730 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
731 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
732 cmd.tid = mvm->queue_info[queue].txq_tid;
733 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
734
735 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
736 queue, iwl_mvm_ac_to_tx_fifo[ac]);
737
738 /* Stop the queue and wait for it to empty */
739 set_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
740
741 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
742 if (ret) {
743 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
744 queue);
745 ret = -EIO;
746 goto out;
747 }
748
749 /* Before redirecting the queue we need to de-activate it */
750 iwl_trans_txq_disable(mvm->trans, queue, false);
751 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
752 if (ret)
753 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
754 ret);
755
756 /* Make sure the SCD wrptr is correctly set before reconfiguring */
757 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
758
759 /* Update the TID "owner" of the queue */
760 mvm->queue_info[queue].txq_tid = tid;
761
762 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
763
764 /* Redirect to lower AC */
765 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
766 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
767
768 /* Update AC marking of the queue */
769 mvm->queue_info[queue].mac80211_ac = ac;
770
771 /*
772 * Mark queue as shared in transport if shared
773 * Note this has to be done after queue enablement because enablement
774 * can also set this value, and there is no indication there to shared
775 * queues
776 */
777 if (shared_queue)
778 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
779
780 out:
781 /* Continue using the queue */
782 clear_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
783
784 return ret;
785 }
786
iwl_mvm_find_free_queue(struct iwl_mvm * mvm,u8 sta_id,u8 minq,u8 maxq)787 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
788 u8 minq, u8 maxq)
789 {
790 int i;
791
792 lockdep_assert_held(&mvm->mutex);
793
794 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues,
795 "max queue %d >= num_of_queues (%d)", maxq,
796 mvm->trans->trans_cfg->base_params->num_of_queues))
797 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1;
798
799 /* This should not be hit with new TX path */
800 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
801 return -ENOSPC;
802
803 /* Start by looking for a free queue */
804 for (i = minq; i <= maxq; i++)
805 if (mvm->queue_info[i].tid_bitmap == 0 &&
806 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
807 return i;
808
809 return -ENOSPC;
810 }
811
iwl_mvm_get_queue_size(struct ieee80211_sta * sta)812 static int iwl_mvm_get_queue_size(struct ieee80211_sta *sta)
813 {
814 int max_size = IWL_DEFAULT_QUEUE_SIZE;
815 unsigned int link_id;
816
817 /* this queue isn't used for traffic (cab_queue) */
818 if (!sta)
819 return IWL_MGMT_QUEUE_SIZE;
820
821 rcu_read_lock();
822
823 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
824 struct ieee80211_link_sta *link =
825 rcu_dereference(sta->link[link_id]);
826
827 if (!link)
828 continue;
829
830 /* support for 1k ba size */
831 if (link->eht_cap.has_eht &&
832 max_size < IWL_DEFAULT_QUEUE_SIZE_EHT)
833 max_size = IWL_DEFAULT_QUEUE_SIZE_EHT;
834
835 /* support for 256 ba size */
836 if (link->he_cap.has_he &&
837 max_size < IWL_DEFAULT_QUEUE_SIZE_HE)
838 max_size = IWL_DEFAULT_QUEUE_SIZE_HE;
839 }
840
841 rcu_read_unlock();
842 return max_size;
843 }
844
iwl_mvm_tvqm_enable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 sta_id,u8 tid,unsigned int timeout)845 int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
846 struct ieee80211_sta *sta,
847 u8 sta_id, u8 tid, unsigned int timeout)
848 {
849 int queue, size;
850 u32 sta_mask = 0;
851
852 if (tid == IWL_MAX_TID_COUNT) {
853 tid = IWL_MGMT_TID;
854 size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
855 mvm->trans->cfg->min_txq_size);
856 } else {
857 size = iwl_mvm_get_queue_size(sta);
858 }
859
860 /* take the min with bc tbl entries allowed */
861 size = min_t(u32, size, mvm->trans->txqs.bc_tbl_size / sizeof(u16));
862
863 /* size needs to be power of 2 values for calculating read/write pointers */
864 size = rounddown_pow_of_two(size);
865
866 if (sta) {
867 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
868 unsigned int link_id;
869
870 for (link_id = 0;
871 link_id < ARRAY_SIZE(mvmsta->link);
872 link_id++) {
873 struct iwl_mvm_link_sta *link =
874 rcu_dereference_protected(mvmsta->link[link_id],
875 lockdep_is_held(&mvm->mutex));
876
877 if (!link)
878 continue;
879
880 sta_mask |= BIT(link->sta_id);
881 }
882 } else {
883 sta_mask |= BIT(sta_id);
884 }
885
886 if (!sta_mask)
887 return -EINVAL;
888
889 do {
890 queue = iwl_trans_txq_alloc(mvm->trans, 0, sta_mask,
891 tid, size, timeout);
892
893 if (queue < 0)
894 IWL_DEBUG_TX_QUEUES(mvm,
895 "Failed allocating TXQ of size %d for sta mask %x tid %d, ret: %d\n",
896 size, sta_mask, tid, queue);
897 size /= 2;
898 } while (queue < 0 && size >= 16);
899
900 if (queue < 0)
901 return queue;
902
903 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta mask 0x%x tid %d\n",
904 queue, sta_mask, tid);
905
906 return queue;
907 }
908
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)909 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
910 struct ieee80211_sta *sta, u8 ac,
911 int tid)
912 {
913 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
914 struct iwl_mvm_txq *mvmtxq =
915 iwl_mvm_txq_from_tid(sta, tid);
916 unsigned int wdg_timeout =
917 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
918 int queue = -1;
919
920 lockdep_assert_held(&mvm->mutex);
921
922 IWL_DEBUG_TX_QUEUES(mvm,
923 "Allocating queue for sta %d on tid %d\n",
924 mvmsta->deflink.sta_id, tid);
925 queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id,
926 tid, wdg_timeout);
927 if (queue < 0)
928 return queue;
929
930 mvmtxq->txq_id = queue;
931 mvm->tvqm_info[queue].txq_tid = tid;
932 mvm->tvqm_info[queue].sta_id = mvmsta->deflink.sta_id;
933
934 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
935
936 spin_lock_bh(&mvmsta->lock);
937 mvmsta->tid_data[tid].txq_id = queue;
938 spin_unlock_bh(&mvmsta->lock);
939
940 return 0;
941 }
942
iwl_mvm_update_txq_mapping(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u8 sta_id,u8 tid)943 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
944 struct ieee80211_sta *sta,
945 int queue, u8 sta_id, u8 tid)
946 {
947 bool enable_queue = true;
948
949 /* Make sure this TID isn't already enabled */
950 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
951 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
952 queue, tid);
953 return false;
954 }
955
956 /* Update mappings and refcounts */
957 if (mvm->queue_info[queue].tid_bitmap)
958 enable_queue = false;
959
960 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
961 mvm->queue_info[queue].ra_sta_id = sta_id;
962
963 if (enable_queue) {
964 if (tid != IWL_MAX_TID_COUNT)
965 mvm->queue_info[queue].mac80211_ac =
966 tid_to_mac80211_ac[tid];
967 else
968 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
969
970 mvm->queue_info[queue].txq_tid = tid;
971 }
972
973 if (sta) {
974 struct iwl_mvm_txq *mvmtxq =
975 iwl_mvm_txq_from_tid(sta, tid);
976
977 mvmtxq->txq_id = queue;
978 }
979
980 IWL_DEBUG_TX_QUEUES(mvm,
981 "Enabling TXQ #%d tids=0x%x\n",
982 queue, mvm->queue_info[queue].tid_bitmap);
983
984 return enable_queue;
985 }
986
iwl_mvm_enable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u16 ssn,const struct iwl_trans_txq_scd_cfg * cfg,unsigned int wdg_timeout)987 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
988 int queue, u16 ssn,
989 const struct iwl_trans_txq_scd_cfg *cfg,
990 unsigned int wdg_timeout)
991 {
992 struct iwl_scd_txq_cfg_cmd cmd = {
993 .scd_queue = queue,
994 .action = SCD_CFG_ENABLE_QUEUE,
995 .window = cfg->frame_limit,
996 .sta_id = cfg->sta_id,
997 .ssn = cpu_to_le16(ssn),
998 .tx_fifo = cfg->fifo,
999 .aggregate = cfg->aggregate,
1000 .tid = cfg->tid,
1001 };
1002 bool inc_ssn;
1003
1004 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1005 return false;
1006
1007 /* Send the enabling command if we need to */
1008 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
1009 return false;
1010
1011 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
1012 NULL, wdg_timeout);
1013 if (inc_ssn)
1014 le16_add_cpu(&cmd.ssn, 1);
1015
1016 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
1017 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
1018
1019 return inc_ssn;
1020 }
1021
iwl_mvm_change_queue_tid(struct iwl_mvm * mvm,int queue)1022 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
1023 {
1024 struct iwl_scd_txq_cfg_cmd cmd = {
1025 .scd_queue = queue,
1026 .action = SCD_CFG_UPDATE_QUEUE_TID,
1027 };
1028 int tid;
1029 unsigned long tid_bitmap;
1030 int ret;
1031
1032 lockdep_assert_held(&mvm->mutex);
1033
1034 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1035 return;
1036
1037 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1038
1039 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
1040 return;
1041
1042 /* Find any TID for queue */
1043 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1044 cmd.tid = tid;
1045 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1046
1047 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
1048 if (ret) {
1049 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
1050 queue, ret);
1051 return;
1052 }
1053
1054 mvm->queue_info[queue].txq_tid = tid;
1055 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
1056 queue, tid);
1057 }
1058
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)1059 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
1060 {
1061 struct ieee80211_sta *sta;
1062 struct iwl_mvm_sta *mvmsta;
1063 u8 sta_id;
1064 int tid = -1;
1065 unsigned long tid_bitmap;
1066 unsigned int wdg_timeout;
1067 int ssn;
1068 int ret = true;
1069
1070 /* queue sharing is disabled on new TX path */
1071 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1072 return;
1073
1074 lockdep_assert_held(&mvm->mutex);
1075
1076 sta_id = mvm->queue_info[queue].ra_sta_id;
1077 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1078
1079 /* Find TID for queue, and make sure it is the only one on the queue */
1080 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1081 if (tid_bitmap != BIT(tid)) {
1082 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1083 queue, tid_bitmap);
1084 return;
1085 }
1086
1087 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1088 tid);
1089
1090 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1091 lockdep_is_held(&mvm->mutex));
1092
1093 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1094 return;
1095
1096 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1097 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1098
1099 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1100
1101 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
1102 tid_to_mac80211_ac[tid], ssn,
1103 wdg_timeout, true,
1104 iwl_mvm_txq_from_tid(sta, tid));
1105 if (ret) {
1106 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1107 return;
1108 }
1109
1110 /* If aggs should be turned back on - do it */
1111 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1112 struct iwl_mvm_add_sta_cmd cmd = {0};
1113
1114 mvmsta->tid_disable_agg &= ~BIT(tid);
1115
1116 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1117 cmd.sta_id = mvmsta->deflink.sta_id;
1118 cmd.add_modify = STA_MODE_MODIFY;
1119 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1120 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1121 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1122
1123 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1124 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1125 if (!ret) {
1126 IWL_DEBUG_TX_QUEUES(mvm,
1127 "TXQ #%d is now aggregated again\n",
1128 queue);
1129
1130 /* Mark queue intenally as aggregating again */
1131 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1132 }
1133 }
1134
1135 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1136 }
1137
1138 /*
1139 * Remove inactive TIDs of a given queue.
1140 * If all queue TIDs are inactive - mark the queue as inactive
1141 * If only some the queue TIDs are inactive - unmap them from the queue
1142 *
1143 * Returns %true if all TIDs were removed and the queue could be reused.
1144 */
iwl_mvm_remove_inactive_tids(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int queue,unsigned long tid_bitmap,unsigned long * unshare_queues,unsigned long * changetid_queues)1145 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1146 struct iwl_mvm_sta *mvmsta, int queue,
1147 unsigned long tid_bitmap,
1148 unsigned long *unshare_queues,
1149 unsigned long *changetid_queues)
1150 {
1151 unsigned int tid;
1152
1153 lockdep_assert_held(&mvmsta->lock);
1154 lockdep_assert_held(&mvm->mutex);
1155
1156 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1157 return false;
1158
1159 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1160 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1161 /* If some TFDs are still queued - don't mark TID as inactive */
1162 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1163 tid_bitmap &= ~BIT(tid);
1164
1165 /* Don't mark as inactive any TID that has an active BA */
1166 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1167 tid_bitmap &= ~BIT(tid);
1168 }
1169
1170 /* If all TIDs in the queue are inactive - return it can be reused */
1171 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1172 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1173 return true;
1174 }
1175
1176 /*
1177 * If we are here, this is a shared queue and not all TIDs timed-out.
1178 * Remove the ones that did.
1179 */
1180 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1181 u16 q_tid_bitmap;
1182
1183 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1184 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1185
1186 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1187
1188 /*
1189 * We need to take into account a situation in which a TXQ was
1190 * allocated to TID x, and then turned shared by adding TIDs y
1191 * and z. If TID x becomes inactive and is removed from the TXQ,
1192 * ownership must be given to one of the remaining TIDs.
1193 * This is mainly because if TID x continues - a new queue can't
1194 * be allocated for it as long as it is an owner of another TXQ.
1195 *
1196 * Mark this queue in the right bitmap, we'll send the command
1197 * to the firmware later.
1198 */
1199 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1200 set_bit(queue, changetid_queues);
1201
1202 IWL_DEBUG_TX_QUEUES(mvm,
1203 "Removing inactive TID %d from shared Q:%d\n",
1204 tid, queue);
1205 }
1206
1207 IWL_DEBUG_TX_QUEUES(mvm,
1208 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1209 mvm->queue_info[queue].tid_bitmap);
1210
1211 /*
1212 * There may be different TIDs with the same mac queues, so make
1213 * sure all TIDs have existing corresponding mac queues enabled
1214 */
1215 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1216
1217 /* If the queue is marked as shared - "unshare" it */
1218 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1219 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1220 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1221 queue);
1222 set_bit(queue, unshare_queues);
1223 }
1224
1225 return false;
1226 }
1227
1228 /*
1229 * Check for inactivity - this includes checking if any queue
1230 * can be unshared and finding one (and only one) that can be
1231 * reused.
1232 * This function is also invoked as a sort of clean-up task,
1233 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1234 *
1235 * Returns the queue number, or -ENOSPC.
1236 */
iwl_mvm_inactivity_check(struct iwl_mvm * mvm,u8 alloc_for_sta)1237 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1238 {
1239 unsigned long now = jiffies;
1240 unsigned long unshare_queues = 0;
1241 unsigned long changetid_queues = 0;
1242 int i, ret, free_queue = -ENOSPC;
1243 struct ieee80211_sta *queue_owner = NULL;
1244
1245 lockdep_assert_held(&mvm->mutex);
1246
1247 if (iwl_mvm_has_new_tx_api(mvm))
1248 return -ENOSPC;
1249
1250 rcu_read_lock();
1251
1252 /* we skip the CMD queue below by starting at 1 */
1253 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1254
1255 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1256 struct ieee80211_sta *sta;
1257 struct iwl_mvm_sta *mvmsta;
1258 u8 sta_id;
1259 int tid;
1260 unsigned long inactive_tid_bitmap = 0;
1261 unsigned long queue_tid_bitmap;
1262
1263 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1264 if (!queue_tid_bitmap)
1265 continue;
1266
1267 /* If TXQ isn't in active use anyway - nothing to do here... */
1268 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1269 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1270 continue;
1271
1272 /* Check to see if there are inactive TIDs on this queue */
1273 for_each_set_bit(tid, &queue_tid_bitmap,
1274 IWL_MAX_TID_COUNT + 1) {
1275 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1276 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1277 continue;
1278
1279 inactive_tid_bitmap |= BIT(tid);
1280 }
1281
1282 /* If all TIDs are active - finish check on this queue */
1283 if (!inactive_tid_bitmap)
1284 continue;
1285
1286 /*
1287 * If we are here - the queue hadn't been served recently and is
1288 * in use
1289 */
1290
1291 sta_id = mvm->queue_info[i].ra_sta_id;
1292 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1293
1294 /*
1295 * If the STA doesn't exist anymore, it isn't an error. It could
1296 * be that it was removed since getting the queues, and in this
1297 * case it should've inactivated its queues anyway.
1298 */
1299 if (IS_ERR_OR_NULL(sta))
1300 continue;
1301
1302 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1303
1304 spin_lock_bh(&mvmsta->lock);
1305 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1306 inactive_tid_bitmap,
1307 &unshare_queues,
1308 &changetid_queues);
1309 if (ret && free_queue < 0) {
1310 queue_owner = sta;
1311 free_queue = i;
1312 }
1313 /* only unlock sta lock - we still need the queue info lock */
1314 spin_unlock_bh(&mvmsta->lock);
1315 }
1316
1317
1318 /* Reconfigure queues requiring reconfiguation */
1319 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1320 iwl_mvm_unshare_queue(mvm, i);
1321 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1322 iwl_mvm_change_queue_tid(mvm, i);
1323
1324 rcu_read_unlock();
1325
1326 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1327 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1328 alloc_for_sta);
1329 if (ret)
1330 return ret;
1331 }
1332
1333 return free_queue;
1334 }
1335
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)1336 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1337 struct ieee80211_sta *sta, u8 ac, int tid)
1338 {
1339 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1340 struct iwl_trans_txq_scd_cfg cfg = {
1341 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1342 .sta_id = mvmsta->deflink.sta_id,
1343 .tid = tid,
1344 .frame_limit = IWL_FRAME_LIMIT,
1345 };
1346 unsigned int wdg_timeout =
1347 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1348 int queue = -1;
1349 u16 queue_tmp;
1350 unsigned long disable_agg_tids = 0;
1351 enum iwl_mvm_agg_state queue_state;
1352 bool shared_queue = false, inc_ssn;
1353 int ssn;
1354 unsigned long tfd_queue_mask;
1355 int ret;
1356
1357 lockdep_assert_held(&mvm->mutex);
1358
1359 if (iwl_mvm_has_new_tx_api(mvm))
1360 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1361
1362 spin_lock_bh(&mvmsta->lock);
1363 tfd_queue_mask = mvmsta->tfd_queue_msk;
1364 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1365 spin_unlock_bh(&mvmsta->lock);
1366
1367 if (tid == IWL_MAX_TID_COUNT) {
1368 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1369 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1370 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1371 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1372 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1373 queue);
1374
1375 /* If no such queue is found, we'll use a DATA queue instead */
1376 }
1377
1378 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1379 (mvm->queue_info[mvmsta->reserved_queue].status ==
1380 IWL_MVM_QUEUE_RESERVED)) {
1381 queue = mvmsta->reserved_queue;
1382 mvm->queue_info[queue].reserved = true;
1383 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1384 }
1385
1386 if (queue < 0)
1387 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1388 IWL_MVM_DQA_MIN_DATA_QUEUE,
1389 IWL_MVM_DQA_MAX_DATA_QUEUE);
1390 if (queue < 0) {
1391 /* try harder - perhaps kill an inactive queue */
1392 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1393 }
1394
1395 /* No free queue - we'll have to share */
1396 if (queue <= 0) {
1397 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1398 if (queue > 0) {
1399 shared_queue = true;
1400 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1401 }
1402 }
1403
1404 /*
1405 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1406 * to make sure no one else takes it.
1407 * This will allow avoiding re-acquiring the lock at the end of the
1408 * configuration. On error we'll mark it back as free.
1409 */
1410 if (queue > 0 && !shared_queue)
1411 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1412
1413 /* This shouldn't happen - out of queues */
1414 if (WARN_ON(queue <= 0)) {
1415 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1416 tid, cfg.sta_id);
1417 return queue;
1418 }
1419
1420 /*
1421 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1422 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1423 * as aggregatable.
1424 * Mark all DATA queues as allowing to be aggregated at some point
1425 */
1426 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1427 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1428
1429 IWL_DEBUG_TX_QUEUES(mvm,
1430 "Allocating %squeue #%d to sta %d on tid %d\n",
1431 shared_queue ? "shared " : "", queue,
1432 mvmsta->deflink.sta_id, tid);
1433
1434 if (shared_queue) {
1435 /* Disable any open aggs on this queue */
1436 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1437
1438 if (disable_agg_tids) {
1439 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1440 queue);
1441 iwl_mvm_invalidate_sta_queue(mvm, queue,
1442 disable_agg_tids, false);
1443 }
1444 }
1445
1446 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1447
1448 /*
1449 * Mark queue as shared in transport if shared
1450 * Note this has to be done after queue enablement because enablement
1451 * can also set this value, and there is no indication there to shared
1452 * queues
1453 */
1454 if (shared_queue)
1455 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1456
1457 spin_lock_bh(&mvmsta->lock);
1458 /*
1459 * This looks racy, but it is not. We have only one packet for
1460 * this ra/tid in our Tx path since we stop the Qdisc when we
1461 * need to allocate a new TFD queue.
1462 */
1463 if (inc_ssn) {
1464 mvmsta->tid_data[tid].seq_number += 0x10;
1465 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1466 }
1467 mvmsta->tid_data[tid].txq_id = queue;
1468 mvmsta->tfd_queue_msk |= BIT(queue);
1469 queue_state = mvmsta->tid_data[tid].state;
1470
1471 if (mvmsta->reserved_queue == queue)
1472 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1473 spin_unlock_bh(&mvmsta->lock);
1474
1475 if (!shared_queue) {
1476 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1477 if (ret)
1478 goto out_err;
1479
1480 /* If we need to re-enable aggregations... */
1481 if (queue_state == IWL_AGG_ON) {
1482 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1483 if (ret)
1484 goto out_err;
1485 }
1486 } else {
1487 /* Redirect queue, if needed */
1488 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1489 wdg_timeout, false,
1490 iwl_mvm_txq_from_tid(sta, tid));
1491 if (ret)
1492 goto out_err;
1493 }
1494
1495 return 0;
1496
1497 out_err:
1498 queue_tmp = queue;
1499 iwl_mvm_disable_txq(mvm, sta, mvmsta->deflink.sta_id, &queue_tmp, tid);
1500
1501 return ret;
1502 }
1503
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1504 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1505 {
1506 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1507 add_stream_wk);
1508
1509 mutex_lock(&mvm->mutex);
1510
1511 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1512
1513 while (!list_empty(&mvm->add_stream_txqs)) {
1514 struct iwl_mvm_txq *mvmtxq;
1515 struct ieee80211_txq *txq;
1516 u8 tid;
1517
1518 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1519 struct iwl_mvm_txq, list);
1520
1521 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1522 drv_priv);
1523 tid = txq->tid;
1524 if (tid == IEEE80211_NUM_TIDS)
1525 tid = IWL_MAX_TID_COUNT;
1526
1527 /*
1528 * We can't really do much here, but if this fails we can't
1529 * transmit anyway - so just don't transmit the frame etc.
1530 * and let them back up ... we've tried our best to allocate
1531 * a queue in the function itself.
1532 */
1533 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1534 spin_lock_bh(&mvm->add_stream_lock);
1535 list_del_init(&mvmtxq->list);
1536 spin_unlock_bh(&mvm->add_stream_lock);
1537 continue;
1538 }
1539
1540 /* now we're ready, any remaining races/concurrency will be
1541 * handled in iwl_mvm_mac_itxq_xmit()
1542 */
1543 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1544
1545 local_bh_disable();
1546 spin_lock(&mvm->add_stream_lock);
1547 list_del_init(&mvmtxq->list);
1548 spin_unlock(&mvm->add_stream_lock);
1549
1550 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1551 local_bh_enable();
1552 }
1553
1554 mutex_unlock(&mvm->mutex);
1555 }
1556
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1557 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1558 struct ieee80211_sta *sta,
1559 enum nl80211_iftype vif_type)
1560 {
1561 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1562 int queue;
1563
1564 /* queue reserving is disabled on new TX path */
1565 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1566 return 0;
1567
1568 /* run the general cleanup/unsharing of queues */
1569 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1570
1571 /* Make sure we have free resources for this STA */
1572 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1573 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1574 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1575 IWL_MVM_QUEUE_FREE))
1576 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1577 else
1578 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1579 IWL_MVM_DQA_MIN_DATA_QUEUE,
1580 IWL_MVM_DQA_MAX_DATA_QUEUE);
1581 if (queue < 0) {
1582 /* try again - this time kick out a queue if needed */
1583 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1584 if (queue < 0) {
1585 IWL_ERR(mvm, "No available queues for new station\n");
1586 return -ENOSPC;
1587 }
1588 }
1589 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1590
1591 mvmsta->reserved_queue = queue;
1592
1593 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1594 queue, mvmsta->deflink.sta_id);
1595
1596 return 0;
1597 }
1598
1599 /*
1600 * In DQA mode, after a HW restart the queues should be allocated as before, in
1601 * order to avoid race conditions when there are shared queues. This function
1602 * does the re-mapping and queue allocation.
1603 *
1604 * Note that re-enabling aggregations isn't done in this function.
1605 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct ieee80211_sta * sta)1606 void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1607 struct ieee80211_sta *sta)
1608 {
1609 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1610 unsigned int wdg =
1611 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1612 int i;
1613 struct iwl_trans_txq_scd_cfg cfg = {
1614 .sta_id = mvm_sta->deflink.sta_id,
1615 .frame_limit = IWL_FRAME_LIMIT,
1616 };
1617
1618 /* Make sure reserved queue is still marked as such (if allocated) */
1619 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1620 mvm->queue_info[mvm_sta->reserved_queue].status =
1621 IWL_MVM_QUEUE_RESERVED;
1622
1623 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1624 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1625 int txq_id = tid_data->txq_id;
1626 int ac;
1627
1628 if (txq_id == IWL_MVM_INVALID_QUEUE)
1629 continue;
1630
1631 ac = tid_to_mac80211_ac[i];
1632
1633 if (iwl_mvm_has_new_tx_api(mvm)) {
1634 IWL_DEBUG_TX_QUEUES(mvm,
1635 "Re-mapping sta %d tid %d\n",
1636 mvm_sta->deflink.sta_id, i);
1637 txq_id = iwl_mvm_tvqm_enable_txq(mvm, sta,
1638 mvm_sta->deflink.sta_id,
1639 i, wdg);
1640 /*
1641 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1642 * to try again later, we have no other good way of
1643 * failing here
1644 */
1645 if (txq_id < 0)
1646 txq_id = IWL_MVM_INVALID_QUEUE;
1647 tid_data->txq_id = txq_id;
1648
1649 /*
1650 * Since we don't set the seq number after reset, and HW
1651 * sets it now, FW reset will cause the seq num to start
1652 * at 0 again, so driver will need to update it
1653 * internally as well, so it keeps in sync with real val
1654 */
1655 tid_data->seq_number = 0;
1656 } else {
1657 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1658
1659 cfg.tid = i;
1660 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1661 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1662 txq_id ==
1663 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1664
1665 IWL_DEBUG_TX_QUEUES(mvm,
1666 "Re-mapping sta %d tid %d to queue %d\n",
1667 mvm_sta->deflink.sta_id, i,
1668 txq_id);
1669
1670 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1671 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1672 }
1673 }
1674 }
1675
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1676 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1677 struct iwl_mvm_int_sta *sta,
1678 const u8 *addr,
1679 u16 mac_id, u16 color)
1680 {
1681 struct iwl_mvm_add_sta_cmd cmd;
1682 int ret;
1683 u32 status = ADD_STA_SUCCESS;
1684
1685 lockdep_assert_held(&mvm->mutex);
1686
1687 memset(&cmd, 0, sizeof(cmd));
1688 cmd.sta_id = sta->sta_id;
1689
1690 if (iwl_mvm_has_new_station_api(mvm->fw) &&
1691 sta->type == IWL_STA_AUX_ACTIVITY)
1692 cmd.mac_id_n_color = cpu_to_le32(mac_id);
1693 else
1694 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1695 color));
1696
1697 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1698 cmd.station_type = sta->type;
1699
1700 if (!iwl_mvm_has_new_tx_api(mvm))
1701 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1702 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1703
1704 if (addr)
1705 memcpy(cmd.addr, addr, ETH_ALEN);
1706
1707 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1708 iwl_mvm_add_sta_cmd_size(mvm),
1709 &cmd, &status);
1710 if (ret)
1711 return ret;
1712
1713 switch (status & IWL_ADD_STA_STATUS_MASK) {
1714 case ADD_STA_SUCCESS:
1715 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1716 return 0;
1717 default:
1718 ret = -EIO;
1719 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1720 status);
1721 break;
1722 }
1723 return ret;
1724 }
1725
1726 /* Initialize driver data of a new sta */
iwl_mvm_sta_init(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,int sta_id,u8 sta_type)1727 int iwl_mvm_sta_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1728 struct ieee80211_sta *sta, int sta_id, u8 sta_type)
1729 {
1730 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1731 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1732 struct iwl_mvm_rxq_dup_data *dup_data;
1733 int i, ret = 0;
1734
1735 lockdep_assert_held(&mvm->mutex);
1736
1737 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1738 mvmvif->color);
1739 mvm_sta->vif = vif;
1740
1741 /* for MLD sta_id(s) should be allocated for each link before calling
1742 * this function
1743 */
1744 if (!mvm->mld_api_is_used) {
1745 if (WARN_ON(sta_id == IWL_MVM_INVALID_STA))
1746 return -EINVAL;
1747
1748 mvm_sta->deflink.sta_id = sta_id;
1749 rcu_assign_pointer(mvm_sta->link[0], &mvm_sta->deflink);
1750
1751 if (!mvm->trans->trans_cfg->gen2)
1752 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1753 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1754 else
1755 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1756 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1757 }
1758
1759 mvm_sta->tt_tx_protection = false;
1760 mvm_sta->sta_type = sta_type;
1761
1762 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1763
1764 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1765 /*
1766 * Mark all queues for this STA as unallocated and defer TX
1767 * frames until the queue is allocated
1768 */
1769 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1770 }
1771
1772 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1773 struct iwl_mvm_txq *mvmtxq =
1774 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1775
1776 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1777 INIT_LIST_HEAD(&mvmtxq->list);
1778 atomic_set(&mvmtxq->tx_request, 0);
1779 }
1780
1781 if (iwl_mvm_has_new_rx_api(mvm)) {
1782 int q;
1783
1784 dup_data = kcalloc(mvm->trans->num_rx_queues,
1785 sizeof(*dup_data), GFP_KERNEL);
1786 if (!dup_data)
1787 return -ENOMEM;
1788 /*
1789 * Initialize all the last_seq values to 0xffff which can never
1790 * compare equal to the frame's seq_ctrl in the check in
1791 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1792 * number and fragmented packets don't reach that function.
1793 *
1794 * This thus allows receiving a packet with seqno 0 and the
1795 * retry bit set as the very first packet on a new TID.
1796 */
1797 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1798 memset(dup_data[q].last_seq, 0xff,
1799 sizeof(dup_data[q].last_seq));
1800 mvm_sta->dup_data = dup_data;
1801 }
1802
1803 if (!iwl_mvm_has_new_tx_api(mvm)) {
1804 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1805 ieee80211_vif_type_p2p(vif));
1806 if (ret)
1807 return ret;
1808 }
1809
1810 /*
1811 * if rs is registered with mac80211, then "add station" will be handled
1812 * via the corresponding ops, otherwise need to notify rate scaling here
1813 */
1814 if (iwl_mvm_has_tlc_offload(mvm))
1815 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1816 else
1817 spin_lock_init(&mvm_sta->deflink.lq_sta.rs_drv.pers.lock);
1818
1819 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1820
1821 return 0;
1822 }
1823
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1824 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1825 struct ieee80211_vif *vif,
1826 struct ieee80211_sta *sta)
1827 {
1828 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1829 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1830 int ret, sta_id;
1831 bool sta_update = false;
1832 unsigned int sta_flags = 0;
1833
1834 lockdep_assert_held(&mvm->mutex);
1835
1836 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1837 sta_id = iwl_mvm_find_free_sta_id(mvm,
1838 ieee80211_vif_type_p2p(vif));
1839 else
1840 sta_id = mvm_sta->deflink.sta_id;
1841
1842 if (sta_id == IWL_MVM_INVALID_STA)
1843 return -ENOSPC;
1844
1845 spin_lock_init(&mvm_sta->lock);
1846
1847 /* if this is a HW restart re-alloc existing queues */
1848 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1849 struct iwl_mvm_int_sta tmp_sta = {
1850 .sta_id = sta_id,
1851 .type = mvm_sta->sta_type,
1852 };
1853
1854 /* First add an empty station since allocating
1855 * a queue requires a valid station
1856 */
1857 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1858 mvmvif->id, mvmvif->color);
1859 if (ret)
1860 goto err;
1861
1862 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1863 sta_update = true;
1864 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1865 goto update_fw;
1866 }
1867
1868 ret = iwl_mvm_sta_init(mvm, vif, sta, sta_id,
1869 sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK);
1870 if (ret)
1871 goto err;
1872
1873 update_fw:
1874 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1875 if (ret)
1876 goto err;
1877
1878 if (vif->type == NL80211_IFTYPE_STATION) {
1879 if (!sta->tdls) {
1880 WARN_ON(mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA);
1881 mvmvif->deflink.ap_sta_id = sta_id;
1882 } else {
1883 WARN_ON(mvmvif->deflink.ap_sta_id == IWL_MVM_INVALID_STA);
1884 }
1885 }
1886
1887 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1888
1889 return 0;
1890
1891 err:
1892 return ret;
1893 }
1894
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1895 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1896 bool drain)
1897 {
1898 struct iwl_mvm_add_sta_cmd cmd = {};
1899 int ret;
1900 u32 status;
1901
1902 lockdep_assert_held(&mvm->mutex);
1903
1904 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1905 cmd.sta_id = mvmsta->deflink.sta_id;
1906 cmd.add_modify = STA_MODE_MODIFY;
1907 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1908 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1909
1910 status = ADD_STA_SUCCESS;
1911 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1912 iwl_mvm_add_sta_cmd_size(mvm),
1913 &cmd, &status);
1914 if (ret)
1915 return ret;
1916
1917 switch (status & IWL_ADD_STA_STATUS_MASK) {
1918 case ADD_STA_SUCCESS:
1919 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1920 mvmsta->deflink.sta_id);
1921 break;
1922 default:
1923 ret = -EIO;
1924 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1925 mvmsta->deflink.sta_id);
1926 break;
1927 }
1928
1929 return ret;
1930 }
1931
1932 /*
1933 * Remove a station from the FW table. Before sending the command to remove
1934 * the station validate that the station is indeed known to the driver (sanity
1935 * only).
1936 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1937 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1938 {
1939 struct ieee80211_sta *sta;
1940 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1941 .sta_id = sta_id,
1942 };
1943 int ret;
1944
1945 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1946 lockdep_is_held(&mvm->mutex));
1947
1948 /* Note: internal stations are marked as error values */
1949 if (!sta) {
1950 IWL_ERR(mvm, "Invalid station id\n");
1951 return -EINVAL;
1952 }
1953
1954 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1955 sizeof(rm_sta_cmd), &rm_sta_cmd);
1956 if (ret) {
1957 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1958 return ret;
1959 }
1960
1961 return 0;
1962 }
1963
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1964 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1965 struct ieee80211_vif *vif,
1966 struct ieee80211_sta *sta)
1967 {
1968 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1969 int i;
1970
1971 lockdep_assert_held(&mvm->mutex);
1972
1973 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1974 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1975 continue;
1976
1977 iwl_mvm_disable_txq(mvm, sta, mvm_sta->deflink.sta_id,
1978 &mvm_sta->tid_data[i].txq_id, i);
1979 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1980 }
1981
1982 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1983 struct iwl_mvm_txq *mvmtxq =
1984 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1985
1986 spin_lock_bh(&mvm->add_stream_lock);
1987 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1988 list_del_init(&mvmtxq->list);
1989 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1990 spin_unlock_bh(&mvm->add_stream_lock);
1991 }
1992 }
1993
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)1994 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1995 struct iwl_mvm_sta *mvm_sta)
1996 {
1997 int i;
1998
1999 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2000 u16 txq_id;
2001 int ret;
2002
2003 spin_lock_bh(&mvm_sta->lock);
2004 txq_id = mvm_sta->tid_data[i].txq_id;
2005 spin_unlock_bh(&mvm_sta->lock);
2006
2007 if (txq_id == IWL_MVM_INVALID_QUEUE)
2008 continue;
2009
2010 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2011 if (ret)
2012 return ret;
2013 }
2014
2015 return 0;
2016 }
2017
2018 /* Execute the common part for both MLD and non-MLD modes.
2019 * Returns if we're done with removing the station, either
2020 * with error or success
2021 */
iwl_mvm_sta_del(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_link_sta * link_sta,int * ret)2022 bool iwl_mvm_sta_del(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2023 struct ieee80211_sta *sta,
2024 struct ieee80211_link_sta *link_sta, int *ret)
2025 {
2026 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2027 struct iwl_mvm_vif_link_info *mvm_link =
2028 mvmvif->link[link_sta->link_id];
2029 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2030 struct iwl_mvm_link_sta *mvm_link_sta;
2031 u8 sta_id;
2032
2033 lockdep_assert_held(&mvm->mutex);
2034
2035 mvm_link_sta =
2036 rcu_dereference_protected(mvm_sta->link[link_sta->link_id],
2037 lockdep_is_held(&mvm->mutex));
2038 sta_id = mvm_link_sta->sta_id;
2039
2040 /* If there is a TXQ still marked as reserved - free it */
2041 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
2042 u8 reserved_txq = mvm_sta->reserved_queue;
2043 enum iwl_mvm_queue_status *status;
2044
2045 /*
2046 * If no traffic has gone through the reserved TXQ - it
2047 * is still marked as IWL_MVM_QUEUE_RESERVED, and
2048 * should be manually marked as free again
2049 */
2050 status = &mvm->queue_info[reserved_txq].status;
2051 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
2052 (*status != IWL_MVM_QUEUE_FREE),
2053 "sta_id %d reserved txq %d status %d",
2054 sta_id, reserved_txq, *status)) {
2055 *ret = -EINVAL;
2056 return true;
2057 }
2058
2059 *status = IWL_MVM_QUEUE_FREE;
2060 }
2061
2062 if (vif->type == NL80211_IFTYPE_STATION &&
2063 mvm_link->ap_sta_id == sta_id) {
2064 /* if associated - we can't remove the AP STA now */
2065 if (vif->cfg.assoc)
2066 return true;
2067
2068 /* first remove remaining keys */
2069 iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link, 0);
2070
2071 /* unassoc - go ahead - remove the AP STA now */
2072 mvm_link->ap_sta_id = IWL_MVM_INVALID_STA;
2073 }
2074
2075 /*
2076 * This shouldn't happen - the TDLS channel switch should be canceled
2077 * before the STA is removed.
2078 */
2079 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
2080 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
2081 cancel_delayed_work(&mvm->tdls_cs.dwork);
2082 }
2083
2084 return false;
2085 }
2086
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2087 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
2088 struct ieee80211_vif *vif,
2089 struct ieee80211_sta *sta)
2090 {
2091 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2092 int ret;
2093
2094 lockdep_assert_held(&mvm->mutex);
2095
2096 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
2097 if (ret)
2098 return ret;
2099
2100 /* flush its queues here since we are freeing mvm_sta */
2101 ret = iwl_mvm_flush_sta(mvm, mvm_sta->deflink.sta_id,
2102 mvm_sta->tfd_queue_msk);
2103 if (ret)
2104 return ret;
2105 if (iwl_mvm_has_new_tx_api(mvm)) {
2106 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
2107 } else {
2108 u32 q_mask = mvm_sta->tfd_queue_msk;
2109
2110 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2111 q_mask);
2112 }
2113 if (ret)
2114 return ret;
2115
2116 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
2117
2118 iwl_mvm_disable_sta_queues(mvm, vif, sta);
2119
2120 if (iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink, &ret))
2121 return ret;
2122
2123 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id);
2124 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL);
2125
2126 return ret;
2127 }
2128
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)2129 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
2130 struct ieee80211_vif *vif,
2131 u8 sta_id)
2132 {
2133 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
2134
2135 lockdep_assert_held(&mvm->mutex);
2136
2137 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
2138 return ret;
2139 }
2140
iwl_mvm_allocate_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,u32 qmask,enum nl80211_iftype iftype,u8 type)2141 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
2142 struct iwl_mvm_int_sta *sta,
2143 u32 qmask, enum nl80211_iftype iftype,
2144 u8 type)
2145 {
2146 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
2147 sta->sta_id == IWL_MVM_INVALID_STA) {
2148 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
2149 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
2150 return -ENOSPC;
2151 }
2152
2153 sta->tfd_queue_msk = qmask;
2154 sta->type = type;
2155
2156 /* put a non-NULL value so iterating over the stations won't stop */
2157 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
2158 return 0;
2159 }
2160
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)2161 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
2162 {
2163 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
2164 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
2165 sta->sta_id = IWL_MVM_INVALID_STA;
2166 }
2167
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 queue,u8 sta_id,u8 fifo)2168 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
2169 u8 sta_id, u8 fifo)
2170 {
2171 unsigned int wdg_timeout =
2172 mvm->trans->trans_cfg->base_params->wd_timeout;
2173 struct iwl_trans_txq_scd_cfg cfg = {
2174 .fifo = fifo,
2175 .sta_id = sta_id,
2176 .tid = IWL_MAX_TID_COUNT,
2177 .aggregate = false,
2178 .frame_limit = IWL_FRAME_LIMIT,
2179 };
2180
2181 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2182
2183 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2184 }
2185
iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm * mvm,u8 sta_id)2186 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
2187 {
2188 unsigned int wdg_timeout =
2189 mvm->trans->trans_cfg->base_params->wd_timeout;
2190
2191 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2192
2193 return iwl_mvm_tvqm_enable_txq(mvm, NULL, sta_id, IWL_MAX_TID_COUNT,
2194 wdg_timeout);
2195 }
2196
iwl_mvm_add_int_sta_with_queue(struct iwl_mvm * mvm,int macidx,int maccolor,u8 * addr,struct iwl_mvm_int_sta * sta,u16 * queue,int fifo)2197 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
2198 int maccolor, u8 *addr,
2199 struct iwl_mvm_int_sta *sta,
2200 u16 *queue, int fifo)
2201 {
2202 int ret;
2203
2204 /* Map queue to fifo - needs to happen before adding station */
2205 if (!iwl_mvm_has_new_tx_api(mvm))
2206 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2207
2208 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
2209 if (ret) {
2210 if (!iwl_mvm_has_new_tx_api(mvm))
2211 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue,
2212 IWL_MAX_TID_COUNT);
2213 return ret;
2214 }
2215
2216 /*
2217 * For 22000 firmware and on we cannot add queue to a station unknown
2218 * to firmware so enable queue here - after the station was added
2219 */
2220 if (iwl_mvm_has_new_tx_api(mvm)) {
2221 int txq;
2222
2223 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2224 if (txq < 0) {
2225 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2226 return txq;
2227 }
2228
2229 *queue = txq;
2230 }
2231
2232 return 0;
2233 }
2234
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm,u32 lmac_id)2235 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2236 {
2237 int ret;
2238 u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 :
2239 BIT(mvm->aux_queue);
2240
2241 lockdep_assert_held(&mvm->mutex);
2242
2243 /* Allocate aux station and assign to it the aux queue */
2244 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask,
2245 NL80211_IFTYPE_UNSPECIFIED,
2246 IWL_STA_AUX_ACTIVITY);
2247 if (ret)
2248 return ret;
2249
2250 /*
2251 * In CDB NICs we need to specify which lmac to use for aux activity
2252 * using the mac_id argument place to send lmac_id to the function
2253 */
2254 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2255 &mvm->aux_sta, &mvm->aux_queue,
2256 IWL_MVM_TX_FIFO_MCAST);
2257 if (ret) {
2258 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2259 return ret;
2260 }
2261
2262 return 0;
2263 }
2264
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2265 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2266 {
2267 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2268
2269 lockdep_assert_held(&mvm->mutex);
2270
2271 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2272 NULL, &mvm->snif_sta,
2273 &mvm->snif_queue,
2274 IWL_MVM_TX_FIFO_BE);
2275 }
2276
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2277 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2278 {
2279 int ret;
2280
2281 lockdep_assert_held(&mvm->mutex);
2282
2283 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA))
2284 return -EINVAL;
2285
2286 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id,
2287 &mvm->snif_queue, IWL_MAX_TID_COUNT);
2288 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2289 if (ret)
2290 IWL_WARN(mvm, "Failed sending remove station\n");
2291
2292 return ret;
2293 }
2294
iwl_mvm_rm_aux_sta(struct iwl_mvm * mvm)2295 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2296 {
2297 int ret;
2298
2299 lockdep_assert_held(&mvm->mutex);
2300
2301 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA))
2302 return -EINVAL;
2303
2304 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id,
2305 &mvm->aux_queue, IWL_MAX_TID_COUNT);
2306 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2307 if (ret)
2308 IWL_WARN(mvm, "Failed sending remove station\n");
2309 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2310
2311 return ret;
2312 }
2313
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)2314 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2315 {
2316 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2317 }
2318
2319 /*
2320 * Send the add station command for the vif's broadcast station.
2321 * Assumes that the station was already allocated.
2322 *
2323 * @mvm: the mvm component
2324 * @vif: the interface to which the broadcast station is added
2325 * @bsta: the broadcast station to add.
2326 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2327 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2328 {
2329 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2330 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2331 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2332 const u8 *baddr = _baddr;
2333 int queue;
2334 int ret;
2335 unsigned int wdg_timeout =
2336 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2337 struct iwl_trans_txq_scd_cfg cfg = {
2338 .fifo = IWL_MVM_TX_FIFO_VO,
2339 .sta_id = mvmvif->deflink.bcast_sta.sta_id,
2340 .tid = IWL_MAX_TID_COUNT,
2341 .aggregate = false,
2342 .frame_limit = IWL_FRAME_LIMIT,
2343 };
2344
2345 lockdep_assert_held(&mvm->mutex);
2346
2347 if (!iwl_mvm_has_new_tx_api(mvm)) {
2348 if (vif->type == NL80211_IFTYPE_AP ||
2349 vif->type == NL80211_IFTYPE_ADHOC) {
2350 queue = mvm->probe_queue;
2351 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2352 queue = mvm->p2p_dev_queue;
2353 } else {
2354 WARN(1, "Missing required TXQ for adding bcast STA\n");
2355 return -EINVAL;
2356 }
2357
2358 bsta->tfd_queue_msk |= BIT(queue);
2359
2360 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2361 }
2362
2363 if (vif->type == NL80211_IFTYPE_ADHOC)
2364 baddr = vif->bss_conf.bssid;
2365
2366 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2367 return -ENOSPC;
2368
2369 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2370 mvmvif->id, mvmvif->color);
2371 if (ret)
2372 return ret;
2373
2374 /*
2375 * For 22000 firmware and on we cannot add queue to a station unknown
2376 * to firmware so enable queue here - after the station was added
2377 */
2378 if (iwl_mvm_has_new_tx_api(mvm)) {
2379 queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, bsta->sta_id,
2380 IWL_MAX_TID_COUNT,
2381 wdg_timeout);
2382 if (queue < 0) {
2383 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2384 return queue;
2385 }
2386
2387 if (vif->type == NL80211_IFTYPE_AP ||
2388 vif->type == NL80211_IFTYPE_ADHOC) {
2389 /* for queue management */
2390 mvm->probe_queue = queue;
2391 /* for use in TX */
2392 mvmvif->deflink.mgmt_queue = queue;
2393 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2394 mvm->p2p_dev_queue = queue;
2395 }
2396 } else if (vif->type == NL80211_IFTYPE_AP ||
2397 vif->type == NL80211_IFTYPE_ADHOC) {
2398 /* set it for use in TX */
2399 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2400 }
2401
2402 return 0;
2403 }
2404
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2405 void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2406 struct ieee80211_vif *vif)
2407 {
2408 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2409 u16 *queueptr, queue;
2410
2411 lockdep_assert_held(&mvm->mutex);
2412
2413 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id,
2414 mvmvif->deflink.bcast_sta.tfd_queue_msk);
2415
2416 switch (vif->type) {
2417 case NL80211_IFTYPE_AP:
2418 case NL80211_IFTYPE_ADHOC:
2419 queueptr = &mvm->probe_queue;
2420 break;
2421 case NL80211_IFTYPE_P2P_DEVICE:
2422 queueptr = &mvm->p2p_dev_queue;
2423 break;
2424 default:
2425 WARN(1, "Can't free bcast queue on vif type %d\n",
2426 vif->type);
2427 return;
2428 }
2429
2430 queue = *queueptr;
2431 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.bcast_sta.sta_id,
2432 queueptr, IWL_MAX_TID_COUNT);
2433
2434 if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC)
2435 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2436
2437 if (iwl_mvm_has_new_tx_api(mvm))
2438 return;
2439
2440 WARN_ON(!(mvmvif->deflink.bcast_sta.tfd_queue_msk & BIT(queue)));
2441 mvmvif->deflink.bcast_sta.tfd_queue_msk &= ~BIT(queue);
2442 }
2443
2444 /* Send the FW a request to remove the station from it's internal data
2445 * structures, but DO NOT remove the entry from the local data structures. */
iwl_mvm_send_rm_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2446 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2447 {
2448 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2449 int ret;
2450
2451 lockdep_assert_held(&mvm->mutex);
2452
2453 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2454
2455 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.bcast_sta.sta_id);
2456 if (ret)
2457 IWL_WARN(mvm, "Failed sending remove station\n");
2458 return ret;
2459 }
2460
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2461 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2462 {
2463 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2464
2465 lockdep_assert_held(&mvm->mutex);
2466
2467 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->deflink.bcast_sta, 0,
2468 ieee80211_vif_type_p2p(vif),
2469 IWL_STA_GENERAL_PURPOSE);
2470 }
2471
2472 /* Allocate a new station entry for the broadcast station to the given vif,
2473 * and send it to the FW.
2474 * Note that each P2P mac should have its own broadcast station.
2475 *
2476 * @mvm: the mvm component
2477 * @vif: the interface to which the broadcast station is added
2478 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2479 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2480 {
2481 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2482 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2483 int ret;
2484
2485 lockdep_assert_held(&mvm->mutex);
2486
2487 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2488 if (ret)
2489 return ret;
2490
2491 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2492
2493 if (ret)
2494 iwl_mvm_dealloc_int_sta(mvm, bsta);
2495
2496 return ret;
2497 }
2498
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2499 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2500 {
2501 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2502
2503 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->deflink.bcast_sta);
2504 }
2505
2506 /*
2507 * Send the FW a request to remove the station from it's internal data
2508 * structures, and in addition remove it from the local data structure.
2509 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2510 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2511 {
2512 int ret;
2513
2514 lockdep_assert_held(&mvm->mutex);
2515
2516 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2517
2518 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2519
2520 return ret;
2521 }
2522
2523 /*
2524 * Allocate a new station entry for the multicast station to the given vif,
2525 * and send it to the FW.
2526 * Note that each AP/GO mac should have its own multicast station.
2527 *
2528 * @mvm: the mvm component
2529 * @vif: the interface to which the multicast station is added
2530 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2531 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2532 {
2533 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2534 struct iwl_mvm_int_sta *msta = &mvmvif->deflink.mcast_sta;
2535 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2536 const u8 *maddr = _maddr;
2537 struct iwl_trans_txq_scd_cfg cfg = {
2538 .fifo = vif->type == NL80211_IFTYPE_AP ?
2539 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2540 .sta_id = msta->sta_id,
2541 .tid = 0,
2542 .aggregate = false,
2543 .frame_limit = IWL_FRAME_LIMIT,
2544 };
2545 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2546 int ret;
2547
2548 lockdep_assert_held(&mvm->mutex);
2549
2550 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2551 vif->type != NL80211_IFTYPE_ADHOC))
2552 return -ENOTSUPP;
2553
2554 /*
2555 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2556 * invalid, so make sure we use the queue we want.
2557 * Note that this is done here as we want to avoid making DQA
2558 * changes in mac80211 layer.
2559 */
2560 if (vif->type == NL80211_IFTYPE_ADHOC)
2561 mvmvif->deflink.cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2562
2563 /*
2564 * While in previous FWs we had to exclude cab queue from TFD queue
2565 * mask, now it is needed as any other queue.
2566 */
2567 if (!iwl_mvm_has_new_tx_api(mvm) &&
2568 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2569 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2570 &cfg,
2571 timeout);
2572 msta->tfd_queue_msk |= BIT(mvmvif->deflink.cab_queue);
2573 }
2574 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2575 mvmvif->id, mvmvif->color);
2576 if (ret)
2577 goto err;
2578
2579 /*
2580 * Enable cab queue after the ADD_STA command is sent.
2581 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2582 * command with unknown station id, and for FW that doesn't support
2583 * station API since the cab queue is not included in the
2584 * tfd_queue_mask.
2585 */
2586 if (iwl_mvm_has_new_tx_api(mvm)) {
2587 int queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, msta->sta_id,
2588 0, timeout);
2589 if (queue < 0) {
2590 ret = queue;
2591 goto err;
2592 }
2593 mvmvif->deflink.cab_queue = queue;
2594 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2595 IWL_UCODE_TLV_API_STA_TYPE))
2596 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2597 &cfg,
2598 timeout);
2599
2600 return 0;
2601 err:
2602 iwl_mvm_dealloc_int_sta(mvm, msta);
2603 return ret;
2604 }
2605
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)2606 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2607 struct ieee80211_key_conf *keyconf,
2608 bool mcast)
2609 {
2610 union {
2611 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2612 struct iwl_mvm_add_sta_key_cmd cmd;
2613 } u = {};
2614 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2615 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2616 __le16 key_flags;
2617 int ret, size;
2618 u32 status;
2619
2620 /* This is a valid situation for GTK removal */
2621 if (sta_id == IWL_MVM_INVALID_STA)
2622 return 0;
2623
2624 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2625 STA_KEY_FLG_KEYID_MSK);
2626 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2627 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2628
2629 if (mcast)
2630 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2631
2632 /*
2633 * The fields assigned here are in the same location at the start
2634 * of the command, so we can do this union trick.
2635 */
2636 u.cmd.common.key_flags = key_flags;
2637 u.cmd.common.key_offset = keyconf->hw_key_idx;
2638 u.cmd.common.sta_id = sta_id;
2639
2640 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2641
2642 status = ADD_STA_SUCCESS;
2643 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2644 &status);
2645
2646 switch (status) {
2647 case ADD_STA_SUCCESS:
2648 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2649 break;
2650 default:
2651 ret = -EIO;
2652 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2653 break;
2654 }
2655
2656 return ret;
2657 }
2658
2659 /*
2660 * Send the FW a request to remove the station from it's internal data
2661 * structures, and in addition remove it from the local data structure.
2662 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2663 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2664 {
2665 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2666 int ret;
2667
2668 lockdep_assert_held(&mvm->mutex);
2669
2670 iwl_mvm_flush_sta(mvm, mvmvif->deflink.mcast_sta.sta_id,
2671 mvmvif->deflink.mcast_sta.tfd_queue_msk);
2672
2673 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.mcast_sta.sta_id,
2674 &mvmvif->deflink.cab_queue, 0);
2675
2676 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.mcast_sta.sta_id);
2677 if (ret)
2678 IWL_WARN(mvm, "Failed sending remove station\n");
2679
2680 return ret;
2681 }
2682
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2683 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2684 {
2685 struct iwl_mvm_delba_data notif = {
2686 .baid = baid,
2687 };
2688
2689 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true,
2690 ¬if, sizeof(notif));
2691 };
2692
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2693 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2694 struct iwl_mvm_baid_data *data)
2695 {
2696 int i;
2697
2698 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2699
2700 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2701 int j;
2702 struct iwl_mvm_reorder_buffer *reorder_buf =
2703 &data->reorder_buf[i];
2704 struct iwl_mvm_reorder_buf_entry *entries =
2705 &data->entries[i * data->entries_per_queue];
2706
2707 spin_lock_bh(&reorder_buf->lock);
2708 if (likely(!reorder_buf->num_stored)) {
2709 spin_unlock_bh(&reorder_buf->lock);
2710 continue;
2711 }
2712
2713 /*
2714 * This shouldn't happen in regular DELBA since the internal
2715 * delBA notification should trigger a release of all frames in
2716 * the reorder buffer.
2717 */
2718 WARN_ON(1);
2719
2720 for (j = 0; j < reorder_buf->buf_size; j++)
2721 __skb_queue_purge(&entries[j].e.frames);
2722 /*
2723 * Prevent timer re-arm. This prevents a very far fetched case
2724 * where we timed out on the notification. There may be prior
2725 * RX frames pending in the RX queue before the notification
2726 * that might get processed between now and the actual deletion
2727 * and we would re-arm the timer although we are deleting the
2728 * reorder buffer.
2729 */
2730 reorder_buf->removed = true;
2731 spin_unlock_bh(&reorder_buf->lock);
2732 del_timer_sync(&reorder_buf->reorder_timer);
2733 }
2734 }
2735
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn,u16 buf_size)2736 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2737 struct iwl_mvm_baid_data *data,
2738 u16 ssn, u16 buf_size)
2739 {
2740 int i;
2741
2742 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2743 struct iwl_mvm_reorder_buffer *reorder_buf =
2744 &data->reorder_buf[i];
2745 struct iwl_mvm_reorder_buf_entry *entries =
2746 &data->entries[i * data->entries_per_queue];
2747 int j;
2748
2749 reorder_buf->num_stored = 0;
2750 reorder_buf->head_sn = ssn;
2751 reorder_buf->buf_size = buf_size;
2752 /* rx reorder timer */
2753 timer_setup(&reorder_buf->reorder_timer,
2754 iwl_mvm_reorder_timer_expired, 0);
2755 spin_lock_init(&reorder_buf->lock);
2756 reorder_buf->mvm = mvm;
2757 reorder_buf->queue = i;
2758 reorder_buf->valid = false;
2759 for (j = 0; j < reorder_buf->buf_size; j++)
2760 __skb_queue_head_init(&entries[j].e.frames);
2761 }
2762 }
2763
iwl_mvm_fw_baid_op_sta(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size)2764 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm,
2765 struct ieee80211_sta *sta,
2766 bool start, int tid, u16 ssn,
2767 u16 buf_size)
2768 {
2769 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2770 struct iwl_mvm_add_sta_cmd cmd = {
2771 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
2772 .sta_id = mvm_sta->deflink.sta_id,
2773 .add_modify = STA_MODE_MODIFY,
2774 };
2775 u32 status;
2776 int ret;
2777
2778 if (start) {
2779 cmd.add_immediate_ba_tid = tid;
2780 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2781 cmd.rx_ba_window = cpu_to_le16(buf_size);
2782 cmd.modify_mask = STA_MODIFY_ADD_BA_TID;
2783 } else {
2784 cmd.remove_immediate_ba_tid = tid;
2785 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID;
2786 }
2787
2788 status = ADD_STA_SUCCESS;
2789 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2790 iwl_mvm_add_sta_cmd_size(mvm),
2791 &cmd, &status);
2792 if (ret)
2793 return ret;
2794
2795 switch (status & IWL_ADD_STA_STATUS_MASK) {
2796 case ADD_STA_SUCCESS:
2797 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2798 start ? "start" : "stopp");
2799 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) &&
2800 !(status & IWL_ADD_STA_BAID_VALID_MASK)))
2801 return -EINVAL;
2802 return u32_get_bits(status, IWL_ADD_STA_BAID_MASK);
2803 case ADD_STA_IMMEDIATE_BA_FAILURE:
2804 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2805 return -ENOSPC;
2806 default:
2807 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2808 start ? "start" : "stopp", status);
2809 return -EIO;
2810 }
2811 }
2812
iwl_mvm_fw_baid_op_cmd(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size,int baid)2813 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm,
2814 struct ieee80211_sta *sta,
2815 bool start, int tid, u16 ssn,
2816 u16 buf_size, int baid)
2817 {
2818 struct iwl_rx_baid_cfg_cmd cmd = {
2819 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) :
2820 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE),
2821 };
2822 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD);
2823 int ret;
2824
2825 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
2826
2827 if (start) {
2828 cmd.alloc.sta_id_mask =
2829 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2830 cmd.alloc.tid = tid;
2831 cmd.alloc.ssn = cpu_to_le16(ssn);
2832 cmd.alloc.win_size = cpu_to_le16(buf_size);
2833 baid = -EIO;
2834 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 1) == 1) {
2835 cmd.remove_v1.baid = cpu_to_le32(baid);
2836 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove));
2837 } else {
2838 cmd.remove.sta_id_mask =
2839 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2840 cmd.remove.tid = cpu_to_le32(tid);
2841 }
2842
2843 ret = iwl_mvm_send_cmd_pdu_status(mvm, cmd_id, sizeof(cmd),
2844 &cmd, &baid);
2845 if (ret)
2846 return ret;
2847
2848 if (!start) {
2849 /* ignore firmware baid on remove */
2850 baid = 0;
2851 }
2852
2853 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2854 start ? "start" : "stopp");
2855
2856 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map))
2857 return -EINVAL;
2858
2859 return baid;
2860 }
2861
iwl_mvm_fw_baid_op(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size,int baid)2862 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2863 bool start, int tid, u16 ssn, u16 buf_size,
2864 int baid)
2865 {
2866 if (fw_has_capa(&mvm->fw->ucode_capa,
2867 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT))
2868 return iwl_mvm_fw_baid_op_cmd(mvm, sta, start,
2869 tid, ssn, buf_size, baid);
2870
2871 return iwl_mvm_fw_baid_op_sta(mvm, sta, start,
2872 tid, ssn, buf_size);
2873 }
2874
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2875 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2876 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2877 {
2878 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2879 struct iwl_mvm_baid_data *baid_data = NULL;
2880 int ret, baid;
2881 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID :
2882 IWL_MAX_BAID_OLD;
2883
2884 lockdep_assert_held(&mvm->mutex);
2885
2886 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) {
2887 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2888 return -ENOSPC;
2889 }
2890
2891 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2892 u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2893
2894 /* sparse doesn't like the __align() so don't check */
2895 #ifndef __CHECKER__
2896 /*
2897 * The division below will be OK if either the cache line size
2898 * can be divided by the entry size (ALIGN will round up) or if
2899 * if the entry size can be divided by the cache line size, in
2900 * which case the ALIGN() will do nothing.
2901 */
2902 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2903 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2904 #endif
2905
2906 /*
2907 * Upward align the reorder buffer size to fill an entire cache
2908 * line for each queue, to avoid sharing cache lines between
2909 * different queues.
2910 */
2911 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2912
2913 /*
2914 * Allocate here so if allocation fails we can bail out early
2915 * before starting the BA session in the firmware
2916 */
2917 baid_data = kzalloc(sizeof(*baid_data) +
2918 mvm->trans->num_rx_queues *
2919 reorder_buf_size,
2920 GFP_KERNEL);
2921 if (!baid_data)
2922 return -ENOMEM;
2923
2924 /*
2925 * This division is why we need the above BUILD_BUG_ON(),
2926 * if that doesn't hold then this will not be right.
2927 */
2928 baid_data->entries_per_queue =
2929 reorder_buf_size / sizeof(baid_data->entries[0]);
2930 }
2931
2932 if (iwl_mvm_has_new_rx_api(mvm) && !start) {
2933 baid = mvm_sta->tid_to_baid[tid];
2934 } else {
2935 /* we don't really need it in this case */
2936 baid = -1;
2937 }
2938
2939 /* Don't send command to remove (start=0) BAID during restart */
2940 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2941 baid = iwl_mvm_fw_baid_op(mvm, sta, start, tid, ssn, buf_size,
2942 baid);
2943
2944 if (baid < 0) {
2945 ret = baid;
2946 goto out_free;
2947 }
2948
2949 if (start) {
2950 mvm->rx_ba_sessions++;
2951
2952 if (!iwl_mvm_has_new_rx_api(mvm))
2953 return 0;
2954
2955 baid_data->baid = baid;
2956 baid_data->timeout = timeout;
2957 baid_data->last_rx = jiffies;
2958 baid_data->rcu_ptr = &mvm->baid_map[baid];
2959 timer_setup(&baid_data->session_timer,
2960 iwl_mvm_rx_agg_session_expired, 0);
2961 baid_data->mvm = mvm;
2962 baid_data->tid = tid;
2963 baid_data->sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1);
2964
2965 mvm_sta->tid_to_baid[tid] = baid;
2966 if (timeout)
2967 mod_timer(&baid_data->session_timer,
2968 TU_TO_EXP_TIME(timeout * 2));
2969
2970 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2971 /*
2972 * protect the BA data with RCU to cover a case where our
2973 * internal RX sync mechanism will timeout (not that it's
2974 * supposed to happen) and we will free the session data while
2975 * RX is being processed in parallel
2976 */
2977 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2978 mvm_sta->deflink.sta_id, tid, baid);
2979 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2980 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2981 } else {
2982 baid = mvm_sta->tid_to_baid[tid];
2983
2984 if (mvm->rx_ba_sessions > 0)
2985 /* check that restart flow didn't zero the counter */
2986 mvm->rx_ba_sessions--;
2987 if (!iwl_mvm_has_new_rx_api(mvm))
2988 return 0;
2989
2990 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2991 return -EINVAL;
2992
2993 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2994 if (WARN_ON(!baid_data))
2995 return -EINVAL;
2996
2997 /* synchronize all rx queues so we can safely delete */
2998 iwl_mvm_free_reorder(mvm, baid_data);
2999 timer_shutdown_sync(&baid_data->session_timer);
3000 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
3001 kfree_rcu(baid_data, rcu_head);
3002 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
3003
3004 /*
3005 * After we've deleted it, do another queue sync
3006 * so if an IWL_MVM_RXQ_NSSN_SYNC was concurrently
3007 * running it won't find a new session in the old
3008 * BAID. It can find the NULL pointer for the BAID,
3009 * but we must not have it find a different session.
3010 */
3011 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_EMPTY,
3012 true, NULL, 0);
3013 }
3014 return 0;
3015
3016 out_free:
3017 kfree(baid_data);
3018 return ret;
3019 }
3020
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)3021 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3022 int tid, u8 queue, bool start)
3023 {
3024 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3025 struct iwl_mvm_add_sta_cmd cmd = {};
3026 int ret;
3027 u32 status;
3028
3029 lockdep_assert_held(&mvm->mutex);
3030
3031 if (start) {
3032 mvm_sta->tfd_queue_msk |= BIT(queue);
3033 mvm_sta->tid_disable_agg &= ~BIT(tid);
3034 } else {
3035 /* In DQA-mode the queue isn't removed on agg termination */
3036 mvm_sta->tid_disable_agg |= BIT(tid);
3037 }
3038
3039 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
3040 cmd.sta_id = mvm_sta->deflink.sta_id;
3041 cmd.add_modify = STA_MODE_MODIFY;
3042 if (!iwl_mvm_has_new_tx_api(mvm))
3043 cmd.modify_mask = STA_MODIFY_QUEUES;
3044 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
3045 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
3046 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
3047
3048 status = ADD_STA_SUCCESS;
3049 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
3050 iwl_mvm_add_sta_cmd_size(mvm),
3051 &cmd, &status);
3052 if (ret)
3053 return ret;
3054
3055 switch (status & IWL_ADD_STA_STATUS_MASK) {
3056 case ADD_STA_SUCCESS:
3057 break;
3058 default:
3059 ret = -EIO;
3060 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
3061 start ? "start" : "stopp", status);
3062 break;
3063 }
3064
3065 return ret;
3066 }
3067
3068 const u8 tid_to_mac80211_ac[] = {
3069 IEEE80211_AC_BE,
3070 IEEE80211_AC_BK,
3071 IEEE80211_AC_BK,
3072 IEEE80211_AC_BE,
3073 IEEE80211_AC_VI,
3074 IEEE80211_AC_VI,
3075 IEEE80211_AC_VO,
3076 IEEE80211_AC_VO,
3077 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
3078 };
3079
3080 static const u8 tid_to_ucode_ac[] = {
3081 AC_BE,
3082 AC_BK,
3083 AC_BK,
3084 AC_BE,
3085 AC_VI,
3086 AC_VI,
3087 AC_VO,
3088 AC_VO,
3089 };
3090
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)3091 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3092 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3093 {
3094 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3095 struct iwl_mvm_tid_data *tid_data;
3096 u16 normalized_ssn;
3097 u16 txq_id;
3098 int ret;
3099
3100 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
3101 return -EINVAL;
3102
3103 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
3104 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
3105 IWL_ERR(mvm,
3106 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
3107 mvmsta->tid_data[tid].state);
3108 return -ENXIO;
3109 }
3110
3111 lockdep_assert_held(&mvm->mutex);
3112
3113 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
3114 iwl_mvm_has_new_tx_api(mvm)) {
3115 u8 ac = tid_to_mac80211_ac[tid];
3116
3117 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
3118 if (ret)
3119 return ret;
3120 }
3121
3122 spin_lock_bh(&mvmsta->lock);
3123
3124 /*
3125 * Note the possible cases:
3126 * 1. An enabled TXQ - TXQ needs to become agg'ed
3127 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
3128 * it as reserved
3129 */
3130 txq_id = mvmsta->tid_data[tid].txq_id;
3131 if (txq_id == IWL_MVM_INVALID_QUEUE) {
3132 ret = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
3133 IWL_MVM_DQA_MIN_DATA_QUEUE,
3134 IWL_MVM_DQA_MAX_DATA_QUEUE);
3135 if (ret < 0) {
3136 IWL_ERR(mvm, "Failed to allocate agg queue\n");
3137 goto out;
3138 }
3139
3140 txq_id = ret;
3141
3142 /* TXQ hasn't yet been enabled, so mark it only as reserved */
3143 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
3144 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
3145 ret = -ENXIO;
3146 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
3147 tid, IWL_MAX_HW_QUEUES - 1);
3148 goto out;
3149
3150 } else if (unlikely(mvm->queue_info[txq_id].status ==
3151 IWL_MVM_QUEUE_SHARED)) {
3152 ret = -ENXIO;
3153 IWL_DEBUG_TX_QUEUES(mvm,
3154 "Can't start tid %d agg on shared queue!\n",
3155 tid);
3156 goto out;
3157 }
3158
3159 IWL_DEBUG_TX_QUEUES(mvm,
3160 "AGG for tid %d will be on queue #%d\n",
3161 tid, txq_id);
3162
3163 tid_data = &mvmsta->tid_data[tid];
3164 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3165 tid_data->txq_id = txq_id;
3166 *ssn = tid_data->ssn;
3167
3168 IWL_DEBUG_TX_QUEUES(mvm,
3169 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
3170 mvmsta->deflink.sta_id, tid, txq_id,
3171 tid_data->ssn,
3172 tid_data->next_reclaimed);
3173
3174 /*
3175 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3176 * to align the wrap around of ssn so we compare relevant values.
3177 */
3178 normalized_ssn = tid_data->ssn;
3179 if (mvm->trans->trans_cfg->gen2)
3180 normalized_ssn &= 0xff;
3181
3182 if (normalized_ssn == tid_data->next_reclaimed) {
3183 tid_data->state = IWL_AGG_STARTING;
3184 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
3185 } else {
3186 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3187 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
3188 }
3189
3190 out:
3191 spin_unlock_bh(&mvmsta->lock);
3192
3193 return ret;
3194 }
3195
iwl_mvm_sta_tx_agg_oper(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 buf_size,bool amsdu)3196 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3197 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
3198 bool amsdu)
3199 {
3200 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3201 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3202 unsigned int wdg_timeout =
3203 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
3204 int queue, ret;
3205 bool alloc_queue = true;
3206 enum iwl_mvm_queue_status queue_status;
3207 u16 ssn;
3208
3209 struct iwl_trans_txq_scd_cfg cfg = {
3210 .sta_id = mvmsta->deflink.sta_id,
3211 .tid = tid,
3212 .frame_limit = buf_size,
3213 .aggregate = true,
3214 };
3215
3216 /*
3217 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
3218 * manager, so this function should never be called in this case.
3219 */
3220 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
3221 return -EINVAL;
3222
3223 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
3224 != IWL_MAX_TID_COUNT);
3225
3226 spin_lock_bh(&mvmsta->lock);
3227 ssn = tid_data->ssn;
3228 queue = tid_data->txq_id;
3229 tid_data->state = IWL_AGG_ON;
3230 mvmsta->agg_tids |= BIT(tid);
3231 tid_data->ssn = 0xffff;
3232 tid_data->amsdu_in_ampdu_allowed = amsdu;
3233 spin_unlock_bh(&mvmsta->lock);
3234
3235 if (iwl_mvm_has_new_tx_api(mvm)) {
3236 /*
3237 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
3238 * would have failed, so if we are here there is no need to
3239 * allocate a queue.
3240 * However, if aggregation size is different than the default
3241 * size, the scheduler should be reconfigured.
3242 * We cannot do this with the new TX API, so return unsupported
3243 * for now, until it will be offloaded to firmware..
3244 * Note that if SCD default value changes - this condition
3245 * should be updated as well.
3246 */
3247 if (buf_size < IWL_FRAME_LIMIT)
3248 return -ENOTSUPP;
3249
3250 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3251 if (ret)
3252 return -EIO;
3253 goto out;
3254 }
3255
3256 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
3257
3258 queue_status = mvm->queue_info[queue].status;
3259
3260 /* Maybe there is no need to even alloc a queue... */
3261 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
3262 alloc_queue = false;
3263
3264 /*
3265 * Only reconfig the SCD for the queue if the window size has
3266 * changed from current (become smaller)
3267 */
3268 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
3269 /*
3270 * If reconfiguring an existing queue, it first must be
3271 * drained
3272 */
3273 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
3274 BIT(queue));
3275 if (ret) {
3276 IWL_ERR(mvm,
3277 "Error draining queue before reconfig\n");
3278 return ret;
3279 }
3280
3281 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3282 mvmsta->deflink.sta_id, tid,
3283 buf_size, ssn);
3284 if (ret) {
3285 IWL_ERR(mvm,
3286 "Error reconfiguring TXQ #%d\n", queue);
3287 return ret;
3288 }
3289 }
3290
3291 if (alloc_queue)
3292 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
3293 &cfg, wdg_timeout);
3294
3295 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
3296 if (queue_status != IWL_MVM_QUEUE_SHARED) {
3297 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3298 if (ret)
3299 return -EIO;
3300 }
3301
3302 /* No need to mark as reserved */
3303 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3304
3305 out:
3306 /*
3307 * Even though in theory the peer could have different
3308 * aggregation reorder buffer sizes for different sessions,
3309 * our ucode doesn't allow for that and has a global limit
3310 * for each station. Therefore, use the minimum of all the
3311 * aggregation sessions and our default value.
3312 */
3313 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
3314 min(mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize,
3315 buf_size);
3316 mvmsta->deflink.lq_sta.rs_drv.lq.agg_frame_cnt_limit =
3317 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize;
3318
3319 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3320 sta->addr, tid);
3321
3322 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->deflink.lq_sta.rs_drv.lq);
3323 }
3324
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)3325 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3326 struct iwl_mvm_sta *mvmsta,
3327 struct iwl_mvm_tid_data *tid_data)
3328 {
3329 u16 txq_id = tid_data->txq_id;
3330
3331 lockdep_assert_held(&mvm->mutex);
3332
3333 if (iwl_mvm_has_new_tx_api(mvm))
3334 return;
3335
3336 /*
3337 * The TXQ is marked as reserved only if no traffic came through yet
3338 * This means no traffic has been sent on this TID (agg'd or not), so
3339 * we no longer have use for the queue. Since it hasn't even been
3340 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3341 * free.
3342 */
3343 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3344 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3345 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3346 }
3347 }
3348
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3349 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3350 struct ieee80211_sta *sta, u16 tid)
3351 {
3352 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3353 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3354 u16 txq_id;
3355 int err;
3356
3357 /*
3358 * If mac80211 is cleaning its state, then say that we finished since
3359 * our state has been cleared anyway.
3360 */
3361 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3362 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3363 return 0;
3364 }
3365
3366 spin_lock_bh(&mvmsta->lock);
3367
3368 txq_id = tid_data->txq_id;
3369
3370 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3371 mvmsta->deflink.sta_id, tid, txq_id,
3372 tid_data->state);
3373
3374 mvmsta->agg_tids &= ~BIT(tid);
3375
3376 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3377
3378 switch (tid_data->state) {
3379 case IWL_AGG_ON:
3380 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3381
3382 IWL_DEBUG_TX_QUEUES(mvm,
3383 "ssn = %d, next_recl = %d\n",
3384 tid_data->ssn, tid_data->next_reclaimed);
3385
3386 tid_data->ssn = 0xffff;
3387 tid_data->state = IWL_AGG_OFF;
3388 spin_unlock_bh(&mvmsta->lock);
3389
3390 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3391
3392 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3393 return 0;
3394 case IWL_AGG_STARTING:
3395 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3396 /*
3397 * The agg session has been stopped before it was set up. This
3398 * can happen when the AddBA timer times out for example.
3399 */
3400
3401 /* No barriers since we are under mutex */
3402 lockdep_assert_held(&mvm->mutex);
3403
3404 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3405 tid_data->state = IWL_AGG_OFF;
3406 err = 0;
3407 break;
3408 default:
3409 IWL_ERR(mvm,
3410 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3411 mvmsta->deflink.sta_id, tid, tid_data->state);
3412 IWL_ERR(mvm,
3413 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3414 err = -EINVAL;
3415 }
3416
3417 spin_unlock_bh(&mvmsta->lock);
3418
3419 return err;
3420 }
3421
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3422 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3423 struct ieee80211_sta *sta, u16 tid)
3424 {
3425 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3426 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3427 u16 txq_id;
3428 enum iwl_mvm_agg_state old_state;
3429
3430 /*
3431 * First set the agg state to OFF to avoid calling
3432 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3433 */
3434 spin_lock_bh(&mvmsta->lock);
3435 txq_id = tid_data->txq_id;
3436 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3437 mvmsta->deflink.sta_id, tid, txq_id,
3438 tid_data->state);
3439 old_state = tid_data->state;
3440 tid_data->state = IWL_AGG_OFF;
3441 mvmsta->agg_tids &= ~BIT(tid);
3442 spin_unlock_bh(&mvmsta->lock);
3443
3444 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3445
3446 if (old_state >= IWL_AGG_ON) {
3447 iwl_mvm_drain_sta(mvm, mvmsta, true);
3448
3449 if (iwl_mvm_has_new_tx_api(mvm)) {
3450 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->deflink.sta_id,
3451 BIT(tid)))
3452 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3453 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3454 } else {
3455 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id)))
3456 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3457 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3458 }
3459
3460 iwl_mvm_drain_sta(mvm, mvmsta, false);
3461
3462 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3463 }
3464
3465 return 0;
3466 }
3467
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)3468 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3469 {
3470 int i, max = -1, max_offs = -1;
3471
3472 lockdep_assert_held(&mvm->mutex);
3473
3474 /* Pick the unused key offset with the highest 'deleted'
3475 * counter. Every time a key is deleted, all the counters
3476 * are incremented and the one that was just deleted is
3477 * reset to zero. Thus, the highest counter is the one
3478 * that was deleted longest ago. Pick that one.
3479 */
3480 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3481 if (test_bit(i, mvm->fw_key_table))
3482 continue;
3483 if (mvm->fw_key_deleted[i] > max) {
3484 max = mvm->fw_key_deleted[i];
3485 max_offs = i;
3486 }
3487 }
3488
3489 if (max_offs < 0)
3490 return STA_KEY_IDX_INVALID;
3491
3492 return max_offs;
3493 }
3494
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3495 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3496 struct ieee80211_vif *vif,
3497 struct ieee80211_sta *sta)
3498 {
3499 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3500
3501 if (sta)
3502 return iwl_mvm_sta_from_mac80211(sta);
3503
3504 /*
3505 * The device expects GTKs for station interfaces to be
3506 * installed as GTKs for the AP station. If we have no
3507 * station ID, then use AP's station ID.
3508 */
3509 if (vif->type == NL80211_IFTYPE_STATION &&
3510 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3511 u8 sta_id = mvmvif->deflink.ap_sta_id;
3512
3513 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3514 lockdep_is_held(&mvm->mutex));
3515
3516 /*
3517 * It is possible that the 'sta' parameter is NULL,
3518 * for example when a GTK is removed - the sta_id will then
3519 * be the AP ID, and no station was passed by mac80211.
3520 */
3521 if (IS_ERR_OR_NULL(sta))
3522 return NULL;
3523
3524 return iwl_mvm_sta_from_mac80211(sta);
3525 }
3526
3527 return NULL;
3528 }
3529
iwl_mvm_pn_cmp(const u8 * pn1,const u8 * pn2,int len)3530 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len)
3531 {
3532 int i;
3533
3534 for (i = len - 1; i >= 0; i--) {
3535 if (pn1[i] > pn2[i])
3536 return 1;
3537 if (pn1[i] < pn2[i])
3538 return -1;
3539 }
3540
3541 return 0;
3542 }
3543
iwl_mvm_send_sta_key(struct iwl_mvm * mvm,u32 sta_id,struct ieee80211_key_conf * key,bool mcast,u32 tkip_iv32,u16 * tkip_p1k,u32 cmd_flags,u8 key_offset,bool mfp)3544 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3545 u32 sta_id,
3546 struct ieee80211_key_conf *key, bool mcast,
3547 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3548 u8 key_offset, bool mfp)
3549 {
3550 union {
3551 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3552 struct iwl_mvm_add_sta_key_cmd cmd;
3553 } u = {};
3554 __le16 key_flags;
3555 int ret;
3556 u32 status;
3557 u16 keyidx;
3558 u64 pn = 0;
3559 int i, size;
3560 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3561 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3562 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY,
3563 new_api ? 2 : 1);
3564
3565 if (sta_id == IWL_MVM_INVALID_STA)
3566 return -EINVAL;
3567
3568 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3569 STA_KEY_FLG_KEYID_MSK;
3570 key_flags = cpu_to_le16(keyidx);
3571 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3572
3573 switch (key->cipher) {
3574 case WLAN_CIPHER_SUITE_TKIP:
3575 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3576 if (api_ver >= 2) {
3577 memcpy((void *)&u.cmd.tx_mic_key,
3578 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3579 IWL_MIC_KEY_SIZE);
3580
3581 memcpy((void *)&u.cmd.rx_mic_key,
3582 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3583 IWL_MIC_KEY_SIZE);
3584 pn = atomic64_read(&key->tx_pn);
3585
3586 } else {
3587 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3588 for (i = 0; i < 5; i++)
3589 u.cmd_v1.tkip_rx_ttak[i] =
3590 cpu_to_le16(tkip_p1k[i]);
3591 }
3592 memcpy(u.cmd.common.key, key->key, key->keylen);
3593 break;
3594 case WLAN_CIPHER_SUITE_CCMP:
3595 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3596 memcpy(u.cmd.common.key, key->key, key->keylen);
3597 if (api_ver >= 2)
3598 pn = atomic64_read(&key->tx_pn);
3599 break;
3600 case WLAN_CIPHER_SUITE_WEP104:
3601 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3602 fallthrough;
3603 case WLAN_CIPHER_SUITE_WEP40:
3604 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3605 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3606 break;
3607 case WLAN_CIPHER_SUITE_GCMP_256:
3608 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3609 fallthrough;
3610 case WLAN_CIPHER_SUITE_GCMP:
3611 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3612 memcpy(u.cmd.common.key, key->key, key->keylen);
3613 if (api_ver >= 2)
3614 pn = atomic64_read(&key->tx_pn);
3615 break;
3616 default:
3617 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3618 memcpy(u.cmd.common.key, key->key, key->keylen);
3619 }
3620
3621 if (mcast)
3622 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3623 if (mfp)
3624 key_flags |= cpu_to_le16(STA_KEY_MFP);
3625
3626 u.cmd.common.key_offset = key_offset;
3627 u.cmd.common.key_flags = key_flags;
3628 u.cmd.common.sta_id = sta_id;
3629
3630 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
3631 i = 0;
3632 else
3633 i = -1;
3634
3635 for (; i < IEEE80211_NUM_TIDS; i++) {
3636 struct ieee80211_key_seq seq = {};
3637 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
3638 int rx_pn_len = 8;
3639 /* there's a hole at 2/3 in FW format depending on version */
3640 int hole = api_ver >= 3 ? 0 : 2;
3641
3642 ieee80211_get_key_rx_seq(key, i, &seq);
3643
3644 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
3645 rx_pn[0] = seq.tkip.iv16;
3646 rx_pn[1] = seq.tkip.iv16 >> 8;
3647 rx_pn[2 + hole] = seq.tkip.iv32;
3648 rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
3649 rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
3650 rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
3651 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
3652 rx_pn = seq.hw.seq;
3653 rx_pn_len = seq.hw.seq_len;
3654 } else {
3655 rx_pn[0] = seq.ccmp.pn[0];
3656 rx_pn[1] = seq.ccmp.pn[1];
3657 rx_pn[2 + hole] = seq.ccmp.pn[2];
3658 rx_pn[3 + hole] = seq.ccmp.pn[3];
3659 rx_pn[4 + hole] = seq.ccmp.pn[4];
3660 rx_pn[5 + hole] = seq.ccmp.pn[5];
3661 }
3662
3663 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
3664 rx_pn_len) > 0)
3665 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn,
3666 rx_pn_len);
3667 }
3668
3669 if (api_ver >= 2) {
3670 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3671 size = sizeof(u.cmd);
3672 } else {
3673 size = sizeof(u.cmd_v1);
3674 }
3675
3676 status = ADD_STA_SUCCESS;
3677 if (cmd_flags & CMD_ASYNC)
3678 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3679 &u.cmd);
3680 else
3681 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3682 &u.cmd, &status);
3683
3684 switch (status) {
3685 case ADD_STA_SUCCESS:
3686 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3687 break;
3688 default:
3689 ret = -EIO;
3690 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3691 break;
3692 }
3693
3694 return ret;
3695 }
3696
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3697 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3698 struct ieee80211_key_conf *keyconf,
3699 u8 sta_id, bool remove_key)
3700 {
3701 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3702
3703 /* verify the key details match the required command's expectations */
3704 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3705 (keyconf->keyidx != 4 && keyconf->keyidx != 5 &&
3706 keyconf->keyidx != 6 && keyconf->keyidx != 7) ||
3707 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3708 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3709 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3710 return -EINVAL;
3711
3712 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3713 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3714 return -EINVAL;
3715
3716 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3717 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3718
3719 if (remove_key) {
3720 /* This is a valid situation for IGTK */
3721 if (sta_id == IWL_MVM_INVALID_STA)
3722 return 0;
3723
3724 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3725 } else {
3726 struct ieee80211_key_seq seq;
3727 const u8 *pn;
3728
3729 switch (keyconf->cipher) {
3730 case WLAN_CIPHER_SUITE_AES_CMAC:
3731 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3732 break;
3733 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3734 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3735 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3736 break;
3737 default:
3738 return -EINVAL;
3739 }
3740
3741 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3742 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3743 igtk_cmd.ctrl_flags |=
3744 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3745 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3746 pn = seq.aes_cmac.pn;
3747 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3748 ((u64) pn[4] << 8) |
3749 ((u64) pn[3] << 16) |
3750 ((u64) pn[2] << 24) |
3751 ((u64) pn[1] << 32) |
3752 ((u64) pn[0] << 40));
3753 }
3754
3755 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n",
3756 remove_key ? "removing" : "installing",
3757 keyconf->keyidx >= 6 ? "B" : "",
3758 keyconf->keyidx, igtk_cmd.sta_id);
3759
3760 if (!iwl_mvm_has_new_rx_api(mvm)) {
3761 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3762 .ctrl_flags = igtk_cmd.ctrl_flags,
3763 .key_id = igtk_cmd.key_id,
3764 .sta_id = igtk_cmd.sta_id,
3765 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3766 };
3767
3768 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3769 ARRAY_SIZE(igtk_cmd_v1.igtk));
3770 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3771 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3772 }
3773 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3774 sizeof(igtk_cmd), &igtk_cmd);
3775 }
3776
3777
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3778 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3779 struct ieee80211_vif *vif,
3780 struct ieee80211_sta *sta)
3781 {
3782 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3783
3784 if (sta)
3785 return sta->addr;
3786
3787 if (vif->type == NL80211_IFTYPE_STATION &&
3788 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3789 u8 sta_id = mvmvif->deflink.ap_sta_id;
3790 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3791 lockdep_is_held(&mvm->mutex));
3792 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
3793 return NULL;
3794
3795 return sta->addr;
3796 }
3797
3798
3799 return NULL;
3800 }
3801
__iwl_mvm_set_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf,u8 key_offset,bool mcast)3802 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3803 struct ieee80211_vif *vif,
3804 struct ieee80211_sta *sta,
3805 struct ieee80211_key_conf *keyconf,
3806 u8 key_offset,
3807 bool mcast)
3808 {
3809 const u8 *addr;
3810 struct ieee80211_key_seq seq;
3811 u16 p1k[5];
3812 u32 sta_id;
3813 bool mfp = false;
3814
3815 if (sta) {
3816 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3817
3818 sta_id = mvm_sta->deflink.sta_id;
3819 mfp = sta->mfp;
3820 } else if (vif->type == NL80211_IFTYPE_AP &&
3821 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3822 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3823
3824 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3825 } else {
3826 IWL_ERR(mvm, "Failed to find station id\n");
3827 return -EINVAL;
3828 }
3829
3830 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) {
3831 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3832 if (!addr) {
3833 IWL_ERR(mvm, "Failed to find mac address\n");
3834 return -EINVAL;
3835 }
3836
3837 /* get phase 1 key from mac80211 */
3838 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3839 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3840
3841 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3842 seq.tkip.iv32, p1k, 0, key_offset,
3843 mfp);
3844 }
3845
3846 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3847 0, NULL, 0, key_offset, mfp);
3848 }
3849
iwl_mvm_set_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf,u8 key_offset)3850 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3851 struct ieee80211_vif *vif,
3852 struct ieee80211_sta *sta,
3853 struct ieee80211_key_conf *keyconf,
3854 u8 key_offset)
3855 {
3856 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3857 struct iwl_mvm_sta *mvm_sta;
3858 u8 sta_id = IWL_MVM_INVALID_STA;
3859 int ret;
3860 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3861
3862 lockdep_assert_held(&mvm->mutex);
3863
3864 if (vif->type != NL80211_IFTYPE_AP ||
3865 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3866 /* Get the station id from the mvm local station table */
3867 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3868 if (!mvm_sta) {
3869 IWL_ERR(mvm, "Failed to find station\n");
3870 return -EINVAL;
3871 }
3872 sta_id = mvm_sta->deflink.sta_id;
3873
3874 /*
3875 * It is possible that the 'sta' parameter is NULL, and thus
3876 * there is a need to retrieve the sta from the local station
3877 * table.
3878 */
3879 if (!sta) {
3880 sta = rcu_dereference_protected(
3881 mvm->fw_id_to_mac_id[sta_id],
3882 lockdep_is_held(&mvm->mutex));
3883 if (IS_ERR_OR_NULL(sta)) {
3884 IWL_ERR(mvm, "Invalid station id\n");
3885 return -EINVAL;
3886 }
3887 }
3888
3889 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3890 return -EINVAL;
3891 } else {
3892 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3893
3894 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3895 }
3896
3897 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3898 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3899 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3900 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3901 goto end;
3902 }
3903
3904 /* If the key_offset is not pre-assigned, we need to find a
3905 * new offset to use. In normal cases, the offset is not
3906 * pre-assigned, but during HW_RESTART we want to reuse the
3907 * same indices, so we pass them when this function is called.
3908 *
3909 * In D3 entry, we need to hardcoded the indices (because the
3910 * firmware hardcodes the PTK offset to 0). In this case, we
3911 * need to make sure we don't overwrite the hw_key_idx in the
3912 * keyconf structure, because otherwise we cannot configure
3913 * the original ones back when resuming.
3914 */
3915 if (key_offset == STA_KEY_IDX_INVALID) {
3916 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3917 if (key_offset == STA_KEY_IDX_INVALID)
3918 return -ENOSPC;
3919 keyconf->hw_key_idx = key_offset;
3920 }
3921
3922 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3923 if (ret)
3924 goto end;
3925
3926 /*
3927 * For WEP, the same key is used for multicast and unicast. Upload it
3928 * again, using the same key offset, and now pointing the other one
3929 * to the same key slot (offset).
3930 * If this fails, remove the original as well.
3931 */
3932 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3933 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3934 sta) {
3935 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3936 key_offset, !mcast);
3937 if (ret) {
3938 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3939 goto end;
3940 }
3941 }
3942
3943 __set_bit(key_offset, mvm->fw_key_table);
3944
3945 end:
3946 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3947 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3948 sta ? sta->addr : zero_addr, ret);
3949 return ret;
3950 }
3951
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3952 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3953 struct ieee80211_vif *vif,
3954 struct ieee80211_sta *sta,
3955 struct ieee80211_key_conf *keyconf)
3956 {
3957 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3958 struct iwl_mvm_sta *mvm_sta;
3959 u8 sta_id = IWL_MVM_INVALID_STA;
3960 int ret, i;
3961
3962 lockdep_assert_held(&mvm->mutex);
3963
3964 /* Get the station from the mvm local station table */
3965 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3966 if (mvm_sta)
3967 sta_id = mvm_sta->deflink.sta_id;
3968 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3969 sta_id = iwl_mvm_vif_from_mac80211(vif)->deflink.mcast_sta.sta_id;
3970
3971
3972 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3973 keyconf->keyidx, sta_id);
3974
3975 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3976 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3977 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3978 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3979
3980 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3981 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3982 keyconf->hw_key_idx);
3983 return -ENOENT;
3984 }
3985
3986 /* track which key was deleted last */
3987 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3988 if (mvm->fw_key_deleted[i] < U8_MAX)
3989 mvm->fw_key_deleted[i]++;
3990 }
3991 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3992
3993 if (sta && !mvm_sta) {
3994 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3995 return 0;
3996 }
3997
3998 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3999 if (ret)
4000 return ret;
4001
4002 /* delete WEP key twice to get rid of (now useless) offset */
4003 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4004 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
4005 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
4006
4007 return ret;
4008 }
4009
iwl_mvm_update_tkip_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta,u32 iv32,u16 * phase1key)4010 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
4011 struct ieee80211_vif *vif,
4012 struct ieee80211_key_conf *keyconf,
4013 struct ieee80211_sta *sta, u32 iv32,
4014 u16 *phase1key)
4015 {
4016 struct iwl_mvm_sta *mvm_sta;
4017 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
4018 bool mfp = sta ? sta->mfp : false;
4019
4020 rcu_read_lock();
4021
4022 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
4023 if (WARN_ON_ONCE(!mvm_sta))
4024 goto unlock;
4025 iwl_mvm_send_sta_key(mvm, mvm_sta->deflink.sta_id, keyconf, mcast,
4026 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
4027 mfp);
4028
4029 unlock:
4030 rcu_read_unlock();
4031 }
4032
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)4033 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
4034 struct ieee80211_sta *sta)
4035 {
4036 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4037 struct iwl_mvm_add_sta_cmd cmd = {
4038 .add_modify = STA_MODE_MODIFY,
4039 .sta_id = mvmsta->deflink.sta_id,
4040 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
4041 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4042 };
4043 int ret;
4044
4045 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4046 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4047 if (ret)
4048 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4049 }
4050
iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum ieee80211_frame_release_type reason,u16 cnt,u16 tids,bool more_data,bool single_sta_queue)4051 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
4052 struct ieee80211_sta *sta,
4053 enum ieee80211_frame_release_type reason,
4054 u16 cnt, u16 tids, bool more_data,
4055 bool single_sta_queue)
4056 {
4057 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4058 struct iwl_mvm_add_sta_cmd cmd = {
4059 .add_modify = STA_MODE_MODIFY,
4060 .sta_id = mvmsta->deflink.sta_id,
4061 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
4062 .sleep_tx_count = cpu_to_le16(cnt),
4063 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4064 };
4065 int tid, ret;
4066 unsigned long _tids = tids;
4067
4068 /* convert TIDs to ACs - we don't support TSPEC so that's OK
4069 * Note that this field is reserved and unused by firmware not
4070 * supporting GO uAPSD, so it's safe to always do this.
4071 */
4072 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
4073 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
4074
4075 /* If we're releasing frames from aggregation or dqa queues then check
4076 * if all the queues that we're releasing frames from, combined, have:
4077 * - more frames than the service period, in which case more_data
4078 * needs to be set
4079 * - fewer than 'cnt' frames, in which case we need to adjust the
4080 * firmware command (but do that unconditionally)
4081 */
4082 if (single_sta_queue) {
4083 int remaining = cnt;
4084 int sleep_tx_count;
4085
4086 spin_lock_bh(&mvmsta->lock);
4087 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
4088 struct iwl_mvm_tid_data *tid_data;
4089 u16 n_queued;
4090
4091 tid_data = &mvmsta->tid_data[tid];
4092
4093 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
4094 if (n_queued > remaining) {
4095 more_data = true;
4096 remaining = 0;
4097 break;
4098 }
4099 remaining -= n_queued;
4100 }
4101 sleep_tx_count = cnt - remaining;
4102 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
4103 mvmsta->sleep_tx_count = sleep_tx_count;
4104 spin_unlock_bh(&mvmsta->lock);
4105
4106 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
4107 if (WARN_ON(cnt - remaining == 0)) {
4108 ieee80211_sta_eosp(sta);
4109 return;
4110 }
4111 }
4112
4113 /* Note: this is ignored by firmware not supporting GO uAPSD */
4114 if (more_data)
4115 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
4116
4117 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
4118 mvmsta->next_status_eosp = true;
4119 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
4120 } else {
4121 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
4122 }
4123
4124 /* block the Tx queues until the FW updated the sleep Tx count */
4125 iwl_trans_block_txq_ptrs(mvm->trans, true);
4126
4127 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
4128 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
4129 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4130 if (ret)
4131 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4132 }
4133
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)4134 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
4135 struct iwl_rx_cmd_buffer *rxb)
4136 {
4137 struct iwl_rx_packet *pkt = rxb_addr(rxb);
4138 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
4139 struct ieee80211_sta *sta;
4140 u32 sta_id = le32_to_cpu(notif->sta_id);
4141
4142 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
4143 return;
4144
4145 rcu_read_lock();
4146 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
4147 if (!IS_ERR_OR_NULL(sta))
4148 ieee80211_sta_eosp(sta);
4149 rcu_read_unlock();
4150 }
4151
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)4152 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
4153 struct iwl_mvm_sta *mvmsta,
4154 bool disable)
4155 {
4156 struct iwl_mvm_add_sta_cmd cmd = {
4157 .add_modify = STA_MODE_MODIFY,
4158 .sta_id = mvmsta->deflink.sta_id,
4159 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4160 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4161 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4162 };
4163 int ret;
4164
4165 if (mvm->mld_api_is_used) {
4166 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvmsta, disable);
4167 return;
4168 }
4169
4170 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4171 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4172 if (ret)
4173 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4174 }
4175
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)4176 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
4177 struct ieee80211_sta *sta,
4178 bool disable)
4179 {
4180 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4181
4182 if (mvm->mld_api_is_used) {
4183 iwl_mvm_mld_sta_modify_disable_tx_ap(mvm, sta, disable);
4184 return;
4185 }
4186
4187 spin_lock_bh(&mvm_sta->lock);
4188
4189 if (mvm_sta->disable_tx == disable) {
4190 spin_unlock_bh(&mvm_sta->lock);
4191 return;
4192 }
4193
4194 mvm_sta->disable_tx = disable;
4195
4196 /*
4197 * If sta PS state is handled by mac80211, tell it to start/stop
4198 * queuing tx for this station.
4199 */
4200 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS))
4201 ieee80211_sta_block_awake(mvm->hw, sta, disable);
4202
4203 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
4204
4205 spin_unlock_bh(&mvm_sta->lock);
4206 }
4207
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)4208 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
4209 struct iwl_mvm_vif *mvmvif,
4210 struct iwl_mvm_int_sta *sta,
4211 bool disable)
4212 {
4213 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
4214 struct iwl_mvm_add_sta_cmd cmd = {
4215 .add_modify = STA_MODE_MODIFY,
4216 .sta_id = sta->sta_id,
4217 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4218 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4219 .mac_id_n_color = cpu_to_le32(id),
4220 };
4221 int ret;
4222
4223 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4224 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4225 if (ret)
4226 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4227 }
4228
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)4229 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
4230 struct iwl_mvm_vif *mvmvif,
4231 bool disable)
4232 {
4233 struct ieee80211_sta *sta;
4234 struct iwl_mvm_sta *mvm_sta;
4235 int i;
4236
4237 if (mvm->mld_api_is_used) {
4238 iwl_mvm_mld_modify_all_sta_disable_tx(mvm, mvmvif, disable);
4239 return;
4240 }
4241
4242 rcu_read_lock();
4243
4244 /* Block/unblock all the stations of the given mvmvif */
4245 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
4246 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
4247 if (IS_ERR_OR_NULL(sta))
4248 continue;
4249
4250 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4251 if (mvm_sta->mac_id_n_color !=
4252 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
4253 continue;
4254
4255 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
4256 }
4257
4258 rcu_read_unlock();
4259
4260 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
4261 return;
4262
4263 /* Need to block/unblock also multicast station */
4264 if (mvmvif->deflink.mcast_sta.sta_id != IWL_MVM_INVALID_STA)
4265 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4266 &mvmvif->deflink.mcast_sta,
4267 disable);
4268
4269 /*
4270 * Only unblock the broadcast station (FW blocks it for immediate
4271 * quiet, not the driver)
4272 */
4273 if (!disable && mvmvif->deflink.bcast_sta.sta_id != IWL_MVM_INVALID_STA)
4274 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4275 &mvmvif->deflink.bcast_sta,
4276 disable);
4277 }
4278
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)4279 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
4280 {
4281 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4282 struct iwl_mvm_sta *mvmsta;
4283
4284 rcu_read_lock();
4285
4286 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->deflink.ap_sta_id);
4287
4288 if (mvmsta)
4289 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
4290
4291 rcu_read_unlock();
4292 }
4293
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)4294 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
4295 {
4296 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
4297
4298 /*
4299 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
4300 * to align the wrap around of ssn so we compare relevant values.
4301 */
4302 if (mvm->trans->trans_cfg->gen2)
4303 sn &= 0xff;
4304
4305 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
4306 }
4307
iwl_mvm_add_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_int_sta * sta,u8 * addr,u32 cipher,u8 * key,u32 key_len)4308 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
4309 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
4310 u8 *key, u32 key_len)
4311 {
4312 int ret;
4313 u16 queue;
4314 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4315 struct ieee80211_key_conf *keyconf;
4316 unsigned int wdg_timeout =
4317 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
4318 bool mld = iwl_mvm_has_mld_api(mvm->fw);
4319 u32 type = mld ? STATION_TYPE_PEER : IWL_STA_LINK;
4320
4321 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
4322 NL80211_IFTYPE_UNSPECIFIED, type);
4323 if (ret)
4324 return ret;
4325
4326 if (mld)
4327 ret = iwl_mvm_mld_add_int_sta_with_queue(mvm, sta, addr,
4328 mvmvif->deflink.fw_link_id,
4329 &queue,
4330 IWL_MAX_TID_COUNT,
4331 &wdg_timeout);
4332 else
4333 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id,
4334 mvmvif->color, addr, sta,
4335 &queue,
4336 IWL_MVM_TX_FIFO_BE);
4337 if (ret)
4338 goto out;
4339
4340 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL);
4341 if (!keyconf) {
4342 ret = -ENOBUFS;
4343 goto out;
4344 }
4345
4346 keyconf->cipher = cipher;
4347 memcpy(keyconf->key, key, key_len);
4348 keyconf->keylen = key_len;
4349 keyconf->flags = IEEE80211_KEY_FLAG_PAIRWISE;
4350
4351 if (mld) {
4352 /* The MFP flag is set according to the station mfp field. Since
4353 * we don't have a station, set it manually.
4354 */
4355 u32 key_flags =
4356 iwl_mvm_get_sec_flags(mvm, vif, NULL, keyconf) |
4357 IWL_SEC_KEY_FLAG_MFP;
4358 u32 sta_mask = BIT(sta->sta_id);
4359
4360 ret = iwl_mvm_mld_send_key(mvm, sta_mask, key_flags, keyconf);
4361 } else {
4362 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
4363 0, NULL, 0, 0, true);
4364 }
4365
4366 kfree(keyconf);
4367 return 0;
4368 out:
4369 iwl_mvm_dealloc_int_sta(mvm, sta);
4370 return ret;
4371 }
4372
iwl_mvm_cancel_channel_switch(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 id)4373 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm,
4374 struct ieee80211_vif *vif,
4375 u32 id)
4376 {
4377 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = {
4378 .id = cpu_to_le32(id),
4379 };
4380 int ret;
4381
4382 ret = iwl_mvm_send_cmd_pdu(mvm,
4383 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD),
4384 CMD_ASYNC,
4385 sizeof(cancel_channel_switch_cmd),
4386 &cancel_channel_switch_cmd);
4387 if (ret)
4388 IWL_ERR(mvm, "Failed to cancel the channel switch\n");
4389 }
4390